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21 Oct-13:50:53 Re: collection of fiebre verde - gachal (#713] (Fiebre Verde)
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21 Oct-12:46:39 Re: fluorite specimen from morocco - but from where? (Tobi)
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21 Oct-09:30:45 Re: inclusion in aquamarine? (Riccardo Modanesi)
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Collection of Machines, Metals and Minerals
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Recovering - Academic




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PostPosted: Oct 09, 2018 22:01    Post subject: Galena with Calcite and Quartz  

Galena with Calcite and Quartz


Below are some photos of another of my Trepca minerals. This piece hosts a very large and lustrous Galena on a bed of Quartz with Calcite. The Galena crystal is about 50 mm wide, and dominates the specimen. The style of the Calcite is what the mineral chaps call poker chip.

I have also include a few close-up photographs of the Galena crystal and a few photographs taken under the microscope of the Calcite and Quartz crystals

Enjoy!



Galena with Quartz and Calcite 1.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 160 mm x 90 mm x 70 mm
 Description:
 Viewed:  893 Time(s)

Galena with Quartz and Calcite 1.jpg



Galena with Quartz and Calcite 2.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 160 mm x 90 mm x 70 mm
 Description:
 Viewed:  892 Time(s)

Galena with Quartz and Calcite 2.jpg



Galena with Quartz and Calcite 3.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 160 mm x 90 mm x 70 mm
 Description:
 Viewed:  892 Time(s)

Galena with Quartz and Calcite 3.jpg



Galena with Quartz and Calcite 4 - REAR.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 160 mm x 90 mm x 70 mm
 Description:
 Viewed:  892 Time(s)

Galena with Quartz and Calcite 4 - REAR.jpg



Galena 1A.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  893 Time(s)

Galena 1A.jpg



Galena 2A.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  892 Time(s)

Galena 2A.jpg



Galena 3A.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  894 Time(s)

Galena 3A.jpg



Galena with Quartz and Calcite - Under the Microscope 1.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  894 Time(s)

Galena with Quartz and Calcite - Under the Microscope 1.jpg



Galena with Quartz and Calcite - Under the Microscope 2.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  892 Time(s)

Galena with Quartz and Calcite - Under the Microscope 2.jpg



Galena with Quartz and Calcite - Under the Microscope 3.jpg
 Mineral: Galena with Calcite and Quartz
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  894 Time(s)

Galena with Quartz and Calcite - Under the Microscope 3.jpg


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Recovering - Academic




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PostPosted: Oct 10, 2018 01:49    Post subject: Hold Me Tight Please!!!  

Hold Me Tight Please!!!

In the machine shop doing an operation, drilling or milling, for example can take less time to perform than the actual set-up. The engine I posted a few days ago is a good example. The time taken to drill and ream the bearings was about 10 minutes, but the time to set the engine up on the milling machine to do these operations took about 90 minutes.

There are many ways to hold a piece of metal for machining, but it must be held very tightly. In the photos below are things we call 1-2-3 blocks. They are called that because they go in the order 25 mm, 50 mm and 75 mm.

They are precision ground to within 0.005 mm, meaning the difference from one end to the other is 0.005 mm, or at least we hope!

These blocks enable you to hold work on the milling machine table in a way that could not be done with a 3- or 4-Jaw chuck. The blocks have many holes, and only some have threads to take a M10 bolt.

These blocks will be used to help me make a few things for my mineral collection special metal display stands! More on that topic later!

Enjoy!



Hold Me Tight - 1.jpg
 Description:
 Viewed:  875 Time(s)

Hold Me Tight - 1.jpg



Hold Me Tight - 2.jpg
 Description:
 Viewed:  875 Time(s)

Hold Me Tight - 2.jpg


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Pierre Joubert




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PostPosted: Oct 10, 2018 04:01    Post subject: Re: Collection of Machines, Metals and Minerals  

Thank you for sharing your fascinating hobby with us! I like the quartz and hematite specimen (Quartz on Hematite 1.jpg)
_________________
Pierre Joubert


'The tree of silence bears the fruit of peace. '
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PostPosted: Oct 10, 2018 13:05    Post subject: Re: Collection of Machines, Metals and Minerals  

Pierre Joubert wrote:
Thank you for sharing your fascinating hobby with us! I like the quartz and hematite specimen (Quartz on Hematite 1.jpg)


Many thanks for your kind words.

I do not have many quartz specimens in my collection. Some people say I should have more, but I tend to focus on sulphides/arsenides and then carbonates and oxides and native elements.

The specimen shown in the photos is one I am thinking about enhancing with the help of a few very small carbide burrs. The only damage to the specimen is on the periphery where the matrix was removed from the host rock. It would be an easy task to remove the broken crystals leaving a hematite bowl full of pristine beta quartz crystals. Most so-called high-end specimens receive this sort of treatment all the time or so I am told by my vendor friends.
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PostPosted: Oct 10, 2018 16:25    Post subject: Cerussite with Barite  

Cerussite

Below are a few photos of another of my Moroccan specimens. It is Cerussite with Barite from the Les Dalles Mine.

I have included a few close-up photographs to highlight some of the nice features present on the piece.

I have also included a few photographs taken with the digital microscope to emphasize crystal morphology. The last photograph shows the character of a small section of the surface, very typical of the whole and dominated by microscopic crystals of Cerussite.

Enjoy!!



Cerussite with Barite 1.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: 120 mm x 140 mm x 80 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite 1.jpg



Cerussite with Barite 2.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: 140 mm x 120 mm x 80 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite 2.jpg



Cerussite with Barite 3 - REAR.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: 140 mm x 120 mm x 80 mm
 Description:
 Viewed:  751 Time(s)

Cerussite with Barite 3 - REAR.jpg



Cerussite with Barite - Close up 1.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  749 Time(s)

Cerussite with Barite - Close up 1.jpg



Cerussite with Barite - Close up 2.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: 140 mm x 120 mm x 80 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite - Close up 2.jpg



Cerussite with Barite - Close up 3.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  749 Time(s)

Cerussite with Barite - Close up 3.jpg



Cerussite with Barite - Close up 4.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 60 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite - Close up 4.jpg



Cerussite with Barite - Under the Microscope 1.JPG
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite  - Under the Microscope 1.JPG



Cerussite with Barite - Under the Microscope 2.JPG
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite  - Under the Microscope 2.JPG



Cerussite with Barite - Under the Microscope 3.JPG
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  750 Time(s)

Cerussite with Barite  - Under the Microscope 3.JPG



Cerussite with Barite - Under the Microscope 4.jpg
 Mineral: Cerussite with Barite
 Locality:
Les Dalles Mine, Mibladen mining district, Mibladen, Midelt, Midelt Province, Dra-Tafilalet Region, Morocco
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  749 Time(s)

Cerussite with Barite  - Under the Microscope 4.jpg


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PostPosted: Oct 10, 2018 17:45    Post subject: From Bulgaria with Love!  

From Bulgaria with Love

Below are a few photos of one of my Bulgarian galena specimens. In this instance the piece is covered with oodles of spinel-law galena crystals and quartz. I consider these Bulgarian Galena specimens a great acquisition for both the beginner and advanced collector. They have a lot of bang for the buck!



Bulgarian Galena 1.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: 100 mm x 70 mm x 50 mm
 Description:
 Viewed:  737 Time(s)

Bulgarian Galena 1.jpg



Bulgarian Galena 2.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: 100 mm x 70 mm x 50 mm
 Description:
 Viewed:  736 Time(s)

Bulgarian Galena 2.jpg



Bulgarian Galena 3 - REAR.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: 100 mm x 70 mm x 50 mm
 Description:
 Viewed:  735 Time(s)

Bulgarian Galena 3 - REAR.jpg



Bulgarian Galena - Closeup 1.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  735 Time(s)

Bulgarian Galena - Closeup 1.jpg



Bulgarian Galena - Closeup 2.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  738 Time(s)

Bulgarian Galena - Closeup 2.jpg



Bulgarian Galena - Closeup 3.jpg
 Mineral: Galena with Quartz
 Locality:
Krushev dol Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  737 Time(s)

Bulgarian Galena - Closeup 3.jpg


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PostPosted: Oct 10, 2018 21:32    Post subject: Spessartine is Spectacular - Who else thinks so?  

Spessartine on Smokey Quartz

Below are a few photos of one of my Chinese spessartine samples. I do not normally collect silicates but when I was offered this specimen a few years ago I just liked the look of it. Back then these specimens were abundant and relatively inexpensive.

Nestled within the crystals is a solitary colourless crystal very interesting in my view.

Enjoy!



Spessartine 1.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: 120 mm x 90 mm x 45 mm
 Description:
 Viewed:  719 Time(s)

Spessartine 1.jpg



Spessartine 2.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: 120 mm x 90 mm x 45 mm
 Description:
 Viewed:  718 Time(s)

Spessartine 2.jpg



Spessartine 3.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: 120 mm x 90 mm x 45 mm
 Description:
 Viewed:  717 Time(s)

Spessartine 3.jpg



Spessartine 4 - REAR.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: 120 mm x 90 mm x 45 mm
 Description:
 Viewed:  718 Time(s)

Spessartine 4 - REAR.jpg



Spessartine - Under the Microscope 1.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  719 Time(s)

Spessartine - Under the Microscope 1.jpg



Spessartine - Under the Microscope 2.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  718 Time(s)

Spessartine - Under the Microscope 2.jpg



Spessartine - Under the Microscope 3.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  718 Time(s)

Spessartine - Under the Microscope 3.jpg



Spessartine - Under the Microscope 4.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  718 Time(s)

Spessartine - Under the Microscope 4.jpg



Spessartine - Under the Microscope 5.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  717 Time(s)

Spessartine - Under the Microscope 5.jpg



Spessartine - Under the Microscope 6.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  720 Time(s)

Spessartine - Under the Microscope 6.jpg



Spessartine - Under the Microscope 7.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  717 Time(s)

Spessartine - Under the Microscope 7.jpg



Spessartine Closeup 1.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  717 Time(s)

Spessartine Closeup 1.jpg



Spessartine Closeup 2.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  717 Time(s)

Spessartine Closeup 2.jpg



Spessartine Closeup 3.jpg
 Mineral: Spessartine on Smokey Quartz
 Locality:
Wushan Spessartine prospects, Tongbei, Yunxiao, Zhangzhou Prefecture, Fujian Province, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  719 Time(s)

Spessartine Closeup 3.jpg


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PostPosted: Oct 11, 2018 01:51    Post subject: Brochantite  

Brochantite


Below is another of my Milpillas Brochantite specimens. Unlike the first I posted a few days ago the crystals on this piece are much darker than those on the other specimen. Like the other specimen the crystals have grown on a thin seam. I have also included a few photographs taken under the microscope with an emphasis on colour and striations.

Enjoy!



Another Brochantite - 1.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 60 mm x 40 mm x 10 mm
 Description:
 Viewed:  680 Time(s)

Another Brochantite - 1.jpg



Another Brochantite - 2.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 60 mm x 40 mm x 10 mm
 Description:
 Viewed:  680 Time(s)

Another Brochantite - 2.jpg



Another Brochantite Under the Microscope 1.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  681 Time(s)

Another Brochantite Under the Microscope 1.jpg



Another Brochantite Under the Microscope 2.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  680 Time(s)

Another Brochantite Under the Microscope 2.jpg



Another Brochantite Under the Microscope 3.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  680 Time(s)

Another Brochantite Under the Microscope 3.jpg


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PostPosted: Oct 11, 2018 02:20    Post subject: MICRO MADNESS  

MICRO MADNESS

Before retiring for the evening I felt a compulsion to show a few more of my toys that I use in the machine shop.

In the first photograph is a set of micrometers that cover the range 0-100 mm (0.01 mm), and in the lower right is a digital micrometer. I tend to use the digital micrometer most times at my age the analogue ones are often too difficult to read. With the digital micrometer you can take measurements in metric and imperial.

In the second photograph is a depth micrometer. You have a selection of rods to cover a wide range of measurements; 0 100 mm. I do not use the depth micrometer as often as the others but it is good to have when you need it you are glad you have got it.

The history of micrometers is a very interesting one, and I encourage the viewers to read about the instrument.

Enjoy!



MICRO MADNESS 1.jpg
 Description:
 Viewed:  678 Time(s)

MICRO MADNESS 1.jpg



MICRO MADNESS 2.jpg
 Description:
 Viewed:  675 Time(s)

MICRO MADNESS 2.jpg


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Gerhard Niklasch




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PostPosted: Oct 11, 2018 12:46    Post subject: Re: Spessartine is Spectacular - Who else thinks so?  

Recovering - Academic wrote:

Nestled within the crystals is a solitary colourless crystal very interesting in my view.

This looks like an unusually face-rich (for the location) fluorite to me. Interesting indeed!

Cheers, Gerhard
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PostPosted: Oct 11, 2018 16:38    Post subject: Trepca Ore Body Revisited  

Arsenopyrite

Below are three photographs of another of my Trepca minerals Arsenopyrite. There is nothing special about this piece other than it comprises oodles of lustrous arsenopyrite crystals. Its main attraction for me was having another specimen with sparkle representative of the Trepca ore-body.



Trepca Arsenopyrite 1.jpg
 Mineral: Arsenopyrite
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 120 mm x 100 mm x 70 mm
 Description:
 Viewed:  551 Time(s)

Trepca Arsenopyrite 1.jpg



Trepca Arsenopyrite 2.jpg
 Mineral: Arsenopyrite
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 120 mm x 100 mm x 70 mm
 Description:
 Viewed:  549 Time(s)

Trepca Arsenopyrite 2.jpg



Trepca Arsenopyrite 3.jpg
 Mineral: Arsenopyrite
 Locality:
Stan Trg (Stari Trg) Mine, Trepča Complex, Trepča Valley, Kosovska Mitrovica, Kosovska Mitrovica District, Kosovo
 Dimensions: 120 mm x 100 mm x 70 mm
 Description:
 Viewed:  549 Time(s)

Trepca Arsenopyrite 3.jpg


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PostPosted: Oct 11, 2018 18:06    Post subject: The Colour Green  

The Colour Green

Below are a few photographs of one of my Chinese malachite specimens. The specimen displays the most incredible chatoyant luster and is composed of hundreds of malachite botryoids.

Under the microscope it is clear that the botryoids are granular and crystalline with a beautiful translucent green colour.

Enjoy!



Malachite Shilu 1.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: 100 m x 100 mm x 40 mm
 Description:
 Viewed:  536 Time(s)

Malachite Shilu 1.JPG



Malachite Shilu 2.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: 100 mm x 100 mm x 40 mm
 Description:
 Viewed:  537 Time(s)

Malachite Shilu 2.JPG



Malachite Shilu 3.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: 100 mm x 100 mm x 40 mm
 Description:
 Viewed:  535 Time(s)

Malachite Shilu 3.JPG



Malachite Shilu 4.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: 100 mm x 100 mm x 40 mm
 Description:
 Viewed:  537 Time(s)

Malachite Shilu 4.JPG



Malachite Shilu - Under the Microscope 1.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  536 Time(s)

Malachite Shilu - Under the Microscope 1.JPG



Malachite Shilu - Under the Microscope 2.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  535 Time(s)

Malachite Shilu - Under the Microscope 2.JPG



Malachite Shilu - Under the Microscope 3.JPG
 Mineral: Malachite
 Locality:
Shilu Mine, Yangchun, Yangjiang Prefecture, Guangdong Province, China
 Dimensions: Field of view about 4 mm
 Description:
 Viewed:  535 Time(s)

Malachite Shilu - Under the Microscope 3.JPG


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PostPosted: Oct 11, 2018 19:30    Post subject: Brushy Creek or Sweetwater take your pick!  

Missouri Galena

Below is a specimen of Galena on Dolomite from the Viburnum trend district of the USA. The locality given was the Brushy Creek Mine, but the lovely lady who sold me the piece was not definite. It could have come from the Sweetwater Mine, so take your pick!

The piece comprises two large Galena crystals. The largest crystal is about 50 mm on edge, and is in remarkable condition for its size.



Missouri Galena - 1.jpg
 Mineral: Galena on Dolomite
 Locality:
Brushy Creek Mine, Greeley, Viburnum Trend District, Reynolds County, Missouri, USA
 Dimensions: 130 mm x 90 mm x 70 mm
 Description:
 Viewed:  518 Time(s)

Missouri Galena - 1.jpg



Missouri Galena - 2.jpg
 Mineral: Galena on Dolomite
 Locality:
Brushy Creek Mine, Greeley, Viburnum Trend District, Reynolds County, Missouri, USA
 Dimensions: 130 mm x 90 mm x 70 mm
 Description:
 Viewed:  518 Time(s)

Missouri Galena - 2.jpg



Missouri Galena - 3.jpg
 Mineral: Galena on Dolomite
 Locality:
Brushy Creek Mine, Greeley, Viburnum Trend District, Reynolds County, Missouri, USA
 Dimensions: 130 mm x 90 mm x 70 mm
 Description:
 Viewed:  519 Time(s)

Missouri Galena - 3.jpg



Missouri Galena -4 - REAR.jpg
 Mineral: Galena on Dolomite
 Locality:
Brushy Creek Mine, Greeley, Viburnum Trend District, Reynolds County, Missouri, USA
 Dimensions: 130 mm x 90 mm x 70 mm
 Description:
 Viewed:  522 Time(s)

Missouri Galena -4 - REAR.jpg


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PostPosted: Oct 11, 2018 23:36    Post subject: Pick a colour - Green or Blue - Chinese Copper Minerals  

Chinese Azurite

Below are some photos of another of my Chinese Azurites. It has superb aesthetics and consists of hundreds of bladed balls of Azurite in a Malachite rich vugh. It is probably best described as an Azurite geode. On one side of the geode Azurite is changing to Malachite.

I have also included a few photographs taken under the microscope emphasizing colour and morphology. Absolutely stunning in my view!



Liufengshan Azurite - 1.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: 140 mm x 90 mm x 90 mm
 Description:
 Viewed:  487 Time(s)

Liufengshan Azurite - 1.jpg



Liufengshan Azurite - 2.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: 140 mm x 90 mm x 90 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - 2.jpg



Liufengshan Azurite - 3.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: 140 mm x 90 mm x 90 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - 3.jpg



Liufengshan Azurite - 4.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: 140 mm x 90 mm x 90 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - 4.jpg



Liufengshan Azurite - 5.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: 140 mm x 90 mm x 90 mm
 Description:
 Viewed:  489 Time(s)

Liufengshan Azurite - 5.jpg



Liufengshan Azurite - Closeup - malachite side.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - Closeup - malachite side.jpg



Liufengshan Azurite - Closeup - azurite side 1.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - Closeup - azurite side 1.jpg



Liufengshan Azurite - Under the Microscope 1.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - Under the Microscope 1.jpg



Liufengshan Azurite - Under the Microscope 2.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  486 Time(s)

Liufengshan Azurite - Under the Microscope 2.jpg



Liufengshan Azurite - Under the Microscope 3.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  487 Time(s)

Liufengshan Azurite - Under the Microscope 3.jpg



Liufengshan Azurite - Under the Microscope 4.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  487 Time(s)

Liufengshan Azurite - Under the Microscope 4.jpg



Liufengshan Azurite - Under the Microscope 5.jpg
 Mineral: Azurite with Malachite
 Locality:
Liufengshan Mine, Guichi District, Chizhou Prefecture, Anhui Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  489 Time(s)

Liufengshan Azurite - Under the Microscope 5.jpg


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PostPosted: Oct 12, 2018 01:17    Post subject: Whats my Angle? OK! I will tell you.  

Whats my Angle? OK! I will tell you.

In the machine shop and especially on the vertical milling machine it is often necessary to hold work at a specific angle to perform the various milling operations.

The photo below shows a standard set of precision ground angle blocks. They are 75 mm long and cover the following range in degrees 1, 2, 3, 4, 5, 10, 15, 20, 25 and 30. You can make many other angles by stacking the blocks on the base or the hypotenuse of any other triangle.

Sometimes they are not the right size, and sometimes you need two of the same angle. The larger angle blocks (110 mm) in the top of the photo were made out of a rectangular piece of mild steel on the milling machine using a carbide cutter and a bit of trigonometry. The sole plate of the engine I showed in a previous post needed an angle cut at 8 degrees on the section that holds a support rod, so it was necessary to make a suitable fixture in the shop.

Often when you are making things in the machine shop you need to make special arbors, jigs and fixtures to complete a task. It can be time-consuming and many times we try to avoid the extra work, but you run the risk of spoiling a job if you try to cut corners no pun intended.



001.JPG
 Description:
 Viewed:  464 Time(s)

001.JPG


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PostPosted: Oct 12, 2018 16:05    Post subject: Cornetite cos I can!  

Cornetite

To start the day I have decided to share a few photos of one of my Cornetite specimens from the DRC (Belgium Congo). It is a very beautiful piece with lots of sparkle. I have also included a few close-up photographs and my now famous (or infamous!!), Under the Microscope series of photographs.

There is a melange of minerals present on this piece, including some rather interesting olive green botryoidal species. I will let the photos speak for themselves.

Enjoy!!



Cornetite - 1.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 90 mm x 70 mm x 50 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - 1.jpg



Cornetite - 2.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 90 mm x 70 mm x 50 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - 2.jpg



Cornetite - 3 - REAR.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 90 mm x 70 mm x 50 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - 3 - REAR.jpg



Cornetite - 4 - SIDE.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 90 mm x 70 mm x 50 mm
 Description:
 Viewed:  376 Time(s)

Cornetite - 4 - SIDE.jpg



Cornetite - 5.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 90 mm x 70 mm x 50 mm
 Description:
 Viewed:  375 Time(s)

Cornetite - 5.jpg



Cornetite - Closeup 1.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - Closeup 1.jpg



Cornetite - Closeup 2.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  376 Time(s)

Cornetite - Closeup 2.jpg



Cornetite - Closeup 3.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  377 Time(s)

Cornetite - Closeup 3.jpg



Cornetite - Under the Microscope 1.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  375 Time(s)

Cornetite - Under the Microscope 1.jpg



Cornetite - Under the Microscope 2.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  376 Time(s)

Cornetite - Under the Microscope 2.jpg



Cornetite - Under the Microscope 3.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - Under the Microscope 3.jpg



Cornetite - Under the Microscope 4.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  375 Time(s)

Cornetite - Under the Microscope 4.jpg



Cornetite - Under the Microscope 5.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - Under the Microscope 5.jpg



Cornetite - Under the Microscope 6.jpg
 Mineral: Cornetite
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  374 Time(s)

Cornetite - Under the Microscope 6.jpg


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PostPosted: Oct 12, 2018 18:47    Post subject: Fluorite Trip the light Fantastic  

Fluorite Trip the light Fantastic

Below are a few photos of one of my Chinese fluorites.

It has a remarkable property that it changes colour in a very subtle but noticeable manner depending on the lighting conditions. Not unusual for fluorite, but pleasing to the eye.

I have included a few photographs under the microscope to highlight the morphology of the crystals and one taken under long wave UV.



Shangbao Fluorite 1.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  359 Time(s)

Shangbao Fluorite 1.jpg



Shangbao Fluorite 2.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite 2.jpg



Shangbao Fluorite 3.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  357 Time(s)

Shangbao Fluorite 3.jpg



Shangbao Fluorite 4.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  360 Time(s)

Shangbao Fluorite 4.jpg



Shangbao Fluorite 5.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite 5.jpg



Shangbao Fluorite 6 - BOTTOM.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite 6 - BOTTOM.jpg



Shangbao Fluorite UV LONG 1.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: 80 mm x 70 mm x 70 mm
 Description:
 Viewed:  357 Time(s)

Shangbao Fluorite UV LONG 1.jpg



Shangbao Fluorite UNDER THE MICROSCOPE 1.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite UNDER THE MICROSCOPE 1.jpg



Shangbao Fluorite UNDER THE MICROSCOPE 2.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite UNDER THE MICROSCOPE 2.jpg



Shangbao Fluorite UNDER THE MICROSCOPE 3.jpg
 Mineral: Fluorite with Quartz
 Locality:
Shangbao Mine, Leiyang, Hengyang Prefecture, Hunan Province, China
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  356 Time(s)

Shangbao Fluorite UNDER THE MICROSCOPE 3.jpg


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PostPosted: Oct 12, 2018 20:26    Post subject: Acanthite Huge and Crazy  

Acanthite Huge and Crazy

Below are a few photographs of another of my Imiter Mine Acanthite specimens. Unlike the last one I posted this specimen is composed of hundreds of crystals with strange shapes and contrasts. Though it was sold to me as Acanthite it could be dyscrasite with acanthite and some native silver. I just do not know at the moment.

I have also included a few photographs taken under the microscope with emphasis on crystal forms.

Enjoy!!



Large Acanthite 1.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  350 Time(s)

Large Acanthite 1.jpg



Large Acanthite 2.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  349 Time(s)

Large Acanthite 2.jpg



Large Acanthite 3.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  349 Time(s)

Large Acanthite 3.jpg



Large Acanthite 4.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  349 Time(s)

Large Acanthite 4.jpg



Large Acanthite 5.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  350 Time(s)

Large Acanthite 5.jpg



Large Acanthite Under the Microscope 1.jpg
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  353 Time(s)

Large Acanthite Under the Microscope 1.jpg



Large Acanthite Under the Microscope 2.JPG
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  350 Time(s)

Large Acanthite Under the Microscope 2.JPG



Large Acanthite Under the Microscope 3.JPG
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: 160 mm x 80 mm x 60 mm
 Description:
 Viewed:  350 Time(s)

Large Acanthite Under the Microscope 3.JPG



Large Acanthite Under the Microscope 4.JPG
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  351 Time(s)

Large Acanthite Under the Microscope 4.JPG



Large Acanthite Under the Microscope 5.JPG
 Mineral: Acanthite
 Locality:
Imiter Mine, Jebel Saghro, Imiter District, Ouarzazate Province, Souss-Massa-Dra Region, Morocco
 Dimensions: Field of view about 3 mm
 Description:
 Viewed:  349 Time(s)

Large Acanthite Under the Microscope 5.JPG


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PostPosted: Oct 13, 2018 01:16    Post subject: Orpiment Bright and Beautiful  

Orpiment Bright and Beautiful

Below are a few photos of one of my Orpiment specimens from the Shimen mine. This piece is a matrix specimen composed of massive Realgar/Orpiment adorned with blood red crystals of Orpiment (confirmed) on which has grown scalenohedral crystals of calcite.

The individual Orpiment crystals range in size from 10 mm to about 35 mm and are extremely gemmy. And they are in pristine condition, which is surprising since Orpiment is a very soft mineral.

I have included a few close-up photographs too.

Enjoy!



Chinese Orpiment 1.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: 140 mm x 80 mm x 60 mm
 Description:
 Viewed:  309 Time(s)

Chinese Orpiment 1.jpg



Chinese Orpiment 2.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: 140 mm x 80 mm x 60 mm
 Description:
 Viewed:  311 Time(s)

Chinese Orpiment 2.jpg



Chinese Orpiment 3.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: 140 mm x 80 mm x 60 mm
 Description:
 Viewed:  308 Time(s)

Chinese Orpiment 3.jpg



Chinese Orpiment 4.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: 140 mm x 80 mm x 60 mm
 Description:
 Viewed:  312 Time(s)

Chinese Orpiment 4.jpg



Chinese Orpiment Up Close 1.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  309 Time(s)

Chinese Orpiment Up Close 1.jpg



Chinese Orpiment Up Close 2.jpg
 Mineral: Orpiment with Calcite
 Locality:
Jiepaiyu Mine (Shimen Mine), Shimen County, Changde Prefecture, Hunan, China
 Dimensions: Field of view about 40 mm
 Description:
 Viewed:  311 Time(s)

Chinese Orpiment Up Close 2.jpg


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PostPosted: Oct 13, 2018 02:09    Post subject: Radioactive Minerals Lets Build a Detector  

Radioactive Minerals Lets Build a Detector

Building HV Power Supplies for PMTs on the kitchen table.

The requirements for a HV power supply to energize a Photomultiplier Tube (PMT) can be very demanding. We need a stable HV output that does not vary under load. For a basic gamma ray detector some of these requirements can be relaxed if you only need to detect radiation. For the Gamma Ray counters shown earlier all I needed was a clean output of about -2000VDC/1mA.

One of the main concerns for a HV power supply is that the AC signal generated by the input oscillator should be a clean, harmonic free voltage. To see what I mean I have included an Oscillogram of the square wave test output that comes with the oscilloscope. You will note that the test square wave is in fact made up of many sine waves of decreasing amplitude. This is not what we want!

I have included an Oscillogram of the output of the oscillator that powers the step-up transformer. It is a very clean signal at about 65 kHz no harmonics, and this is what we need.

I have included a block diagram of the HV power circuit. It is in fact your standard garden-variety power supply found in virtually all consumer electronics sold in the last 50 years, except my design goes the opposite way. Instead of taking a 120VAC and turning it into 5VDC, I took 5VAC and converted into -2000VDC.

It is that simple, and should be. The more complex something is the more likely things can go wrong. Science, true science is about simplicity in design and explanation. Do not be fooled by smoke and mirrors. It must be kept simple!

If there is enough interest I might start a FMF thread called the Kitchen Table Workbench why buy when you can build.



DIGITAL OSCILLOSCOPE.jpg
 Description:
The Modern 100MHz Digital Storage Oscilloscope. Inexpensive and readily available!
 Viewed:  298 Time(s)

DIGITAL OSCILLOSCOPE.jpg



POWER SUPPLY BLOCK DIAGRAM.jpg
 Description:
I am just doing backwards what consumer electronics have done forwards for 50 years.
 Viewed:  297 Time(s)

POWER SUPPLY BLOCK DIAGRAM.jpg



RIGOL SQUARE WAVE SPECTRUM.jpg
 Description:
Square wave test output that comes with the DSO - actually just a lot of sine waves!
 Viewed:  297 Time(s)

RIGOL SQUARE WAVE SPECTRUM.jpg



FFT SPECTRUM.jpg
 Description:
The output from my little oscillator. It does not get much easier than this!
 Viewed:  298 Time(s)

FFT SPECTRUM.jpg



PASSBAND OF TRANSFORMER.jpg
 Description:
This is a diagram of the pass-band. The centre frequency, depending on the components used can be anywhere from 40 kHz to 65 KHz.
 Viewed:  297 Time(s)

PASSBAND OF TRANSFORMER.jpg


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