We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


Spanish message board






Newest topics and users posts
18 Mar-08:12:52 Green seam. Looks like it in a state of decay. (Ning)
18 Mar-06:47:13 Mineralogy & museums 10 - cardiff - 12th-13th august 2024 (Roy Starkey)
18 Mar-02:50:32 Re: collection from dany mabillard (Dany Mabillard)
17 Mar-01:57:58 Re: collection of volkmar stingl (Volkmar Stingl)
15 Mar-14:27:47 Re: collection of philippe durand (Philippe Durand)
15 Mar-13:49:04 Re: collection of firmo espinar (Firmo Espinar)
15 Mar-09:18:42 Re: collection of michael shaw (Michael Shaw)
15 Mar-03:45:43 The mizunaka collection - rhodochrosite (Am Mizunaka)
14 Mar-21:29:31 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
14 Mar-14:47:27 Re: collection of philippe durand (Jordi Fabre)
14 Mar-13:56:01 Re: collection of philippe durand (Philippe Durand)
14 Mar-11:24:43 Re: collection of philippe durand (Jordi Fabre)
14 Mar-08:55:22 Re: collection of michael shaw (Michael Shaw)
14 Mar-08:44:47 Re: the mim museum in beirut, lebanon (Mim Museum)
14 Mar-07:24:12 Re: collection of volkmar stingl (Volkmar Stingl)
14 Mar-02:30:15 The mizunaka collection - quartz (Am Mizunaka)
14 Mar-02:20:37 Re: collection of volkmar stingl (Tobi)
13 Mar-23:40:08 Re: collection of volkmar stingl (Volkmar Stingl)
13 Mar-14:22:58 Re: don lum collection (Don Lum)
13 Mar-14:02:43 Re: collection of philippe durand (Philippe Durand)
13 Mar-00:57:48 The mizunaka collection - quartz (Am Mizunaka)
12 Mar-07:36:06 Re: can you recommend a lab to analyse specimens (Luiz Oliveira)
11 Mar-16:19:18 Re: collection of philippe durand (Riccardo Modanesi)
11 Mar-15:18:26 Re: collection of philippe durand (Philippe Durand)
11 Mar-15:13:07 Re: collection of philippe durand (Philippe Durand)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
111630


The time now is Mar 18, 2024 21:05

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
Silvia's Collection
  Goto page Previous  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12  Next
  Index -> Women's Private Collections
Like
1026


View previous topic :: View next topic  
Author Message

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 07, 2022 13:20    Post subject: Common Minerals - Silvia's Collection  

A cabinet sized sample of a lustrous pyrite floater "sun" formed between an ancient bed of shale and clay near Sparta, Illinois.


01 - PYRITE SUN - SPARTA - USA - DISPLAY VIEW 1.jpg
 Mineral: Pyrite
 Locality:
Sparta, Randolph County, Illinois, USA
 Dimensions: 110 mm x 105 mm x 8 mm
 Description:
Display view 1
 Viewed:  12606 Time(s)

01 - PYRITE SUN - SPARTA - USA - DISPLAY VIEW 1.jpg



02 - PYRITE SUN - SPARTA - USA - DISPLAY VIEW 2.jpg
 Mineral: Pyrite
 Locality:
Sparta, Randolph County, Illinois, USA
 Dimensions: 110 mm x 105 mm x 8 mm
 Description:
Display view 2
 Viewed:  12612 Time(s)

02 - PYRITE SUN - SPARTA - USA - DISPLAY VIEW 2.jpg



03 - DETAIL OF THE CRYSTALS 1.jpg
 Mineral: Pyrite
 Locality:
Sparta, Randolph County, Illinois, USA
 Dimensions: 110 mm x 105 mm x 8 mm
 Description:
Detail of the crystals 1
 Viewed:  12604 Time(s)

03 - DETAIL OF THE CRYSTALS 1.jpg



04 - DETAIL OF THE CRYSTALS 2.jpg
 Mineral: Pyrite
 Locality:
Sparta, Randolph County, Illinois, USA
 Dimensions: 110 mm x 105 mm x 8 mm
 Description:
Detail of the crystals 2
 Viewed:  12608 Time(s)

04 - DETAIL OF THE CRYSTALS 2.jpg


Back to top
Reply to topic Reply with quote
Like
9
   

Roger Warin




Joined: 23 Jan 2013
Posts: 1171


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 07, 2022 14:03    Post subject: Re: Silvia's Collection  

Hello Silvia,
Can you explain this growth?
Thanks.
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 07, 2022 17:54    Post subject: Re: Silvia's Collection  

I am just a retired science teacher. I think you might be able to explain it better than I.
Back to top
Reply to topic Reply with quote
Like
   

Michael Shaw
Site Admin



Joined: 30 Apr 2008
Posts: 2055
Location: Oklahoma


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 07, 2022 20:35    Post subject: Re: Silvia's Collection  

The July/August 2022 issue of Rocks and Minerals has a very good in depth article explaining the growth of pyrite suns. Rocks & Minerals Vol. 97(4): 330-346.
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 08, 2022 13:35    Post subject: Re: Silvia's Collection  

Michael Shaw wrote:
The July/August 2022 issue of Rocks and Minerals has a very good in depth article explaining the growth of pyrite suns. Rocks & Minerals Vol. 97(4): 330-346.


Many thanks for the tip. I did see an article published by the Illinois geological survey, but I will also look at the RM article too.

Now that coal mining is becoming an activity of the past in the west (but a booming and ever growing industry in China - yes I am smiling) these pyrite suns will become a rare commodity. If you have not got a good one I suggest buying one.
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 14, 2022 14:36    Post subject: Pseudomorphs - Silvia's Collection  

The specimen contains a super-sharp pseudo of Malachite after Azurite, and the sharp, tabular rhombohedral habit of the original Azurite has been preserved superbly by the Malachite, to the point that you can see each edge and variation in the original crystal. The Malachite has an aesthetic chatoyant deep forest-green luster. The large prominent rhombohedral crystal of Malachite after Azurite is 53 mm wide.


01 - MALACHITE AFTER AZURITE - FRONT - VIEW 1.jpg
 Mineral: Malachite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 120 mm x 80 mm x 50 mm
 Description:
View 1
 Viewed:  12389 Time(s)

01 - MALACHITE AFTER AZURITE - FRONT - VIEW 1.jpg



02 - MALACHITE AFTER AZURITE - REAR - VIEW 0.jpg
 Mineral: Malachite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 120 mm x 80 mm x 50 mm
 Description:
Matrix view
 Viewed:  12385 Time(s)

02 - MALACHITE AFTER AZURITE - REAR - VIEW 0.jpg



03 - MALACHITE AFTER AZURITE - CLOSEUP.jpg
 Mineral: Malachite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 120 mm x 80 mm x 50 mm
 Description:
Large crystal of malachite after Azurite
 Viewed:  12385 Time(s)

03 - MALACHITE AFTER AZURITE - CLOSEUP.jpg


Back to top
Reply to topic Reply with quote
Like
11
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 22, 2022 17:46    Post subject: Azurite - Silvia's Collection  

This is an attractive specimen of Azurite on matrix from the Milpillas Mine in Mexico. The piece features lustrous, deep electric blue well-formed crystals of Azurite associated with minor mint green Malachite sitting on contrasting matrix. The matrix is composed of Dickite, but the Azurite rests on what could be a primary Copper mineral, perhaps Chalcocite but the identity remains unknown. My favorite aspect of the piece is that the Azurite crystals are incredibly gemmy showing an electric indigo hue, a feature that has defined Azurite from the Milpillas mine.


01 - AZURITE ON MATRIX - MILPILLAS - MEXICO.jpg
 Mineral: Azurite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 8 cm x 6 cm x 5 cm
 Description:
View 1
 Viewed:  12274 Time(s)

01 - AZURITE ON MATRIX - MILPILLAS - MEXICO.jpg



02 - AZURITE ON MATRIX - MILPILLAS - MEXICO - MATRIX VIEW 1.jpg
 Mineral: Azurite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 8 cm x 6 cm x 5 cm
 Description:
Matrix view
 Viewed:  12289 Time(s)

02 - AZURITE ON MATRIX - MILPILLAS - MEXICO - MATRIX VIEW 1.jpg



03 - DETAIL OF SOME OF THE CRYSTALS.jpg
 Mineral: Azurite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 8 cm x 6 cm x 5 cm
 Description:
Detail of the crystals 1
 Viewed:  12291 Time(s)

03 - DETAIL OF SOME OF THE CRYSTALS.jpg



04 - DETAIIL OF SOME OF THE CRYSTALS.jpg
 Mineral: Azurite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 8 cm x 6 cm x 5 cm
 Description:
Detail of the crystals 2
 Viewed:  12299 Time(s)

04 - DETAIIL OF SOME OF THE CRYSTALS.jpg


Back to top
Reply to topic Reply with quote
Like
11
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 02, 2023 15:55    Post subject: Re: Silvia's Collection  

Native Copper

A fantastic display of dendritic Native Copper from the famous Milpillas mine in Mexico. The specimen has an excellent natural patina of coppery milk chocolate, with some thin patches of Cuprite on some of the larger Copper crystals. The Copper crystals show complex and modified forms of the octahedron, with some crystals developing to about 5 mm across. The white patches are Quartz.

As far as collecting Milpillas minerals are concerned (indeed all minerals) we have endeavored to obtain quality material from all parts of the ore-body. We want our collection to highlight the unique geochemistry of the ore body. We are first and foremost scientific collectors, and we consider great aesthetics to be just icing on the proverbial mineralogical cake.



01A - NATIVE COPPER - MILPILLAS - DISPLAY VIEW 1.jpg
 Mineral: Native Copper
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 10 cm x 5 cm x 2 cm
 Description:
Copper
 Viewed:  10437 Time(s)

01A - NATIVE COPPER - MILPILLAS - DISPLAY VIEW 1.jpg



02A - NATIVE COPPER - MILPILLAS - DISPLAY VIEW 2.jpg
 Mineral: Native Copper
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 10 cm x 5 cm x 2 cm
 Description:
Copper
 Viewed:  10443 Time(s)

02A - NATIVE COPPER - MILPILLAS - DISPLAY VIEW 2.jpg


Back to top
Reply to topic Reply with quote
Like
8
   

James Catmur
Site Admin



Joined: 14 Sep 2006
Posts: 1336
Location: Cambridge


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 03, 2023 04:01    Post subject: Re: Silvia's Collection  

Welcome back Silvia, I noticed that you had stopped posting your great photos
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 04, 2023 12:31    Post subject: Re: Silvia's Collection  

Hello Bob [James]:

Many thanks for your kind words, but I think full credit should go to my camera.

We have been doing a lot of travelling and purchasing minerals from fellow collectors, which we still have to catalogue and photograph. My partner also acquired a stunning 1 kilogram ingot of high purity Germanium and a large boule of high purity Silicon for his chemical element collection. He plans to polish and etch the Germanium ingot.

However mineral collecting is not my primary interest. My main passions, like those of my partner and one of our four children, are chemistry and astronomy. My partner also has a passion for RF electronics and mechanical engineering.

So if I disappear for a few weeks or a few months it is because I am probably doing some very ‘nerdy’ things with my partner and our children.
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 04, 2023 12:32    Post subject: Re: Silvia's Collection  

Sorry James, I called you Bob. I do not know why - perhaps old age is creeping up on me!!!
Back to top
Reply to topic Reply with quote
Like
1
   

James Catmur
Site Admin



Joined: 14 Sep 2006
Posts: 1336
Location: Cambridge


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 04, 2023 15:41    Post subject: Re: Silvia's Collection  

No worry, we all do that sort of thing as we age.

silvia wrote:
Sorry James, I called you Bob. I do not know why - perhaps old age is creeping up on me!!!
Back to top
Reply to topic Reply with quote
Like
2
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 05, 2023 15:48    Post subject: Monster Cuprite Crystal - Silvia's Collection  

Shown is a beautiful specimen of the mineral Cuprite with minor Native Silver from the famous Rubtsovsk Mine. The specimen consists of a very large Cuprite crystal approximately 75 mm long (tip-to-tip) intergrown with two smaller Cuprite crystals each about 32 mm long. Blebs of native Silver are interspersed between some of the Cuprite crystals on the rear of the specimen. The Cuprite crystals display the octahedral habit with some dodecahedral modifications. The Cuprite crystals are light blue. Brilliant ruby red hues can be seen with transmitted light.


01 - CUPRITE - DISPLAY VIEW 1.jpg
 Mineral: Cuprite and Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: 75 mm x 50 mm x 50 mm
 Description:
Cuprite with Silver
 Viewed:  10169 Time(s)

01 - CUPRITE - DISPLAY VIEW 1.jpg



02 - CUPRITE - CLOSEUP 1.jpg
 Mineral: Cuprite and Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: 75 mm x 50 mm x 50 mm
 Description:
FOV 6 mm
 Viewed:  10167 Time(s)

02 - CUPRITE - CLOSEUP 1.jpg



03 - CUPRITE - CLOSEUP 2.jpg
 Mineral: Cuprite and Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: 75 mm x 50 mm x 50 mm
 Description:
FOV 6 mm
 Viewed:  10173 Time(s)

03 - CUPRITE - CLOSEUP 2.jpg


Back to top
Reply to topic Reply with quote
Like
12
   

Tobi
Site Admin



Joined: 07 Apr 2009
Posts: 4087
Location: Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 06, 2023 01:46    Post subject: Re: Silvia's Collection  

Incredible size - what a beautiful "monster"!
Back to top
Reply to topic Reply with quote
Like
2
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 11, 2023 11:49    Post subject: Brochantite - Silvia's Collection  

An enchanting and rich display specimen of the mineral Brochantite from the famous Milpillas mine in Mexico. The specimen consists of clusters of well-formed and sharp translucent emerald-green Brochantite crystals with chisel tip terminations. The crystals exhibit a bright glassy lustre and some exhibit multiple parallel striations along the length of the crystal. The largest crystals are about 10 mm in length. The white material might be Dickite.


01A - BROCHANTITE - MILPILLAS - MEXICO VIEW 1.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 6 cm x 4 cm x 1 cm
 Description:
Front view
 Viewed:  9558 Time(s)

01A - BROCHANTITE - MILPILLAS - MEXICO VIEW 1.jpg



02A - BROCHANTITE - MILPILLAS - MEXICO VIEW 2.jpg
 Mineral: Brochantite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 6 cm x 4 cm x 1 cm
 Description:
Rear View
 Viewed:  9573 Time(s)

02A - BROCHANTITE - MILPILLAS - MEXICO VIEW 2.jpg


Back to top
Reply to topic Reply with quote
Like
10
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 18, 2023 12:36    Post subject: Malachite - DRC Style - Silvia's Collection  

Malachite

A beautiful large cabinet display specimen of the mineral Malachite from the famous Mashamba West mine in the DRC. The specimen is composed of oodles of intergrown well-formed stalagmites of botyroidal Malachite to 50 mm in length. Some of the stalagmites are covered with a second generation of crystallized Malachite.

I am very fond of Malachite, and I think it is a wonderful mineral to add to any collection. We try to collect the many morphological varieties of the mineral so as to add depth to our collection

In terms of quality to cost, it is possible to obtain some outstanding specimens for very little money. This applies especially to the material from the Congo. Equivalent quality historical pieces from Bisbee (USA), Burra (Australia) or Yekaterinburg (Russia) would be very expensive.

Malachite ‘rocks’ in my opinion!!



1 - MASHAMBA WEST BIG - DISPLAY VIEW 1.jpg
 Mineral: Malachite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 170 mm x 120 mm x 70 mm
 Description:
Beautiful Malachite
 Viewed:  9283 Time(s)

1 - MASHAMBA WEST BIG - DISPLAY VIEW 1.jpg



2 - MASHAMBA WEST BIG - DISPLAY VIEW 2.jpg
 Mineral: Malachite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 170 mm x 120 mm x 70 mm
 Description:
Another view
 Viewed:  9280 Time(s)

2 - MASHAMBA WEST BIG - DISPLAY VIEW 2.jpg



3 - MASHAMBA WEST BIG - MATRIX VIEW.jpg
 Mineral: Malachite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 170 mm x 120 mm x 70 mm
 Description:
One of my 'classic' matrix views
 Viewed:  9280 Time(s)

3 - MASHAMBA WEST BIG - MATRIX VIEW.jpg



CHINESE CONGO MINES 2.jpg
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Description:
An aerial photo of the Kolwezi mines as they appeared in early 2022.

Open Cut GPS coordinates (digital)

A - DIKULUWE PIT, -10.74472, 25.36250 – Sicomines (Gécamines/SIMCO/Chinese companies)
B - MASHAMBA WEST PIT, -10.74083, 25.37556 – Sicomines (Gécamines/SIMCO/Chinese companies)
C - MASHAMBA EAST PIT, -10.74250, 25.39472 - Kamoto Copper Company (Glencore)
 Viewed:  9280 Time(s)

CHINESE CONGO MINES 2.jpg



AERIAL VIEW OF PROCESSING PLANT.jpg
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Description:
Aerial photo of the main Sicomines processing facility
 Viewed:  9280 Time(s)

AERIAL VIEW OF PROCESSING PLANT.jpg



MASHAMBA EAST PIT.jpg
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Description:
Mashamba East Pit (photo courtesy C. Kresse)
 Viewed:  9285 Time(s)

MASHAMBA EAST PIT.jpg



DUST JACKET.jpg
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Description:
Mining Films – Kolwezi Mines

Empire of Dust is a documentary about the problems the Chinese Railway Engineering Company (CREC) encountered in constructing a 300 kilometer sealed road connecting Kolwezi with Katanga’s capital, Lubumbashi, formerly known as Elisabethville. The road was originally built by the Belgians in the 1950s but was neglected and had deteriorated since independence like the rest of Congo’s infrastructure. Lao Yang, who works for the company is repeatedly stunned at the level of incompetence, laziness, lack of organization and forethought of the local workers. Even the simplest tasks become extraordinary challenges for the Chinese engineers. It is a very amusing film, and highlights many of the problems people face in the Congo.

(Dust jacket photo courtesy of Bram Van Paesschen)
 Viewed:  9274 Time(s)

DUST JACKET.jpg


Back to top
Reply to topic Reply with quote
Like
8
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 25, 2023 11:56    Post subject: Back to Panasqueira - Silvia's Collection  

An enchanting and rich ‘combo’ specimen containing Marcasite, Pyrite, Arsenopyrite, Calcite and Quartz from the famous Panasqueira mine in Portugal. The well-formed crystals of Marcasite with their characteristic hints of green measure to about 25 mm and sit proudly on top of the piece. The Calcite occurs as slightly curved flat rhomboids – a form commonly referred to by most mineral collectors as poker-chip Calcite. The Calcite crystals do display a very faint pink fluorescence in the presence of LED lighting, but in the absence of analysis it is not known if they are true Mangano-Calcite crystals. The Pyrite exhibits the pyritohedron form. The specimen may also host Dolomite. Some well-formed water-clear rhombs can be observed in the close up shots, but the true nature of these is yet to be confirmed.

I think it is a truly wonderful specimen, but I am very biased as I think the minerals of the Panasqueira mine rule the mineral kingdom.



01 - COMBO.jpg
 Mineral: Marcasite, Pyrite, Arsenopyrite, Calcite & Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 6 cm x 4 cm
 Description:
View 1
 Viewed:  9035 Time(s)

01 - COMBO.jpg



02 - COMBO.jpg
 Mineral: Marcasite, Pyrite, Arsenopyrite, Calcite & Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 6 cm x 4 cm
 Description:
View 2
 Viewed:  9044 Time(s)

02 - COMBO.jpg



03 - COMBO UP CLOSE.jpg
 Mineral: Marcasite, Pyrite, Arsenopyrite, Calcite & Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 6 cm x 4 cm
 Description:
This was shot using the ‘decelerating’ camera technique. This enables me to achieve full depth of field from the rear to the front – nothing is or should be fuzzy. The specimen was shot as a HD video and the video, about 2 seconds long was processed in Helicon focus. This was a first-attempt and I am happy with the results which are getting better with each photo.

FOV: 10 mm
 Viewed:  9025 Time(s)

03 - COMBO UP CLOSE.jpg



04 - COMBO UP CLOSE.jpg
 Mineral: Marcasite, Pyrite, Arsenopyrite, Calcite & Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 6 cm x 4 cm
 Description:
This was shot using the ‘decelerating’ camera technique. This enables me to achieve full depth of field from the rear to the front – nothing is or should be fuzzy. The specimen was shot as a HD video and the video, about 2 seconds long was processed in Helicon focus. This was a first-attempt and I am happy with the results which are getting better with each photo.

FOV: 10 mm
 Viewed:  9066 Time(s)

04 - COMBO UP CLOSE.jpg



05 - COMBO UP CLOSE.jpg
 Mineral: Marcasite, Pyrite, Arsenopyrite, Calcite & Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 6 cm x 4 cm
 Description:
This was shot using the ‘decelerating’ camera technique. This enables me to achieve full depth of field from the rear to the front – nothing is or should be fuzzy. The specimen was shot as a HD video and the video, about 2 seconds long was processed in Helicon focus. This was a first-attempt and I am happy with the results which are getting better with each photo.

FOV: 10 mm
 Viewed:  9069 Time(s)

05 - COMBO UP CLOSE.jpg


Back to top
Reply to topic Reply with quote
Like
9
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 01, 2023 12:12    Post subject: Photopeaking - Tricks and Treats - Malachite - Silvia's Collection  

An enchanting and rich display specimen of the mineral Malachite from the famous Mashamba west mine in the DRC. The specimen consists of three large botryoids of Malachite coated with a second generation of Malachite crystals. The crystallized Malachite consists of oodles of well-formed translucent emerald-green crystals to 0.5 mm which gives the specimen a very ‘sparkly’ appearance when viewed in direct light. The Malachite sits on a matrix of fine grained Dolomite. Concentric bands of Malachite are visible at the boundary of the Malachite with the Dolomite.


01 - MALACHITE - MASHAMBA WEST - DISPLAY VIEW 1.jpg
 Mineral: Malachite on Dolomite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 120 mm x 90 mm x 50 mm
 Description:
The photo of this specimen was taken using my Canon EOS M6 Mark II camera using the photopeaking method. The method is very briefly outlined on page 222 of the most recent addition of the Advanced Users Guide for the Canon EOS M6 Mark II. The feature is activated using the Camera’s firmware functions also described on page 222. The Camera is mounted on a very stable tripod. I select Av on the ‘mode dial’ located on the top of Camera body and then select AF using the ‘Focus mode Switch’ control lever located on the rear of the Camera body. The method requires the focus ring on the lens assembly to be adjusted until the subject or a section of the subject is in focus. The point of focus is indicated by a red band of dots shown on the LCD image of the subject. With mineral photographs it is necessary to use the LCD ‘zoom’ function set to either x5 or x10 to see if a particular section of the subject is in focus. If not, the focus ring on the lens assembly is adjusted to achieve focus. Often when one portion of the image of the mineral is in focus other portions will be out of focus. This is fine, and a direct consequence of using the photopeaking method to photograph mineral specimens. Multiple photos (sometimes as many as 40 or more depending on the size of the specimen) are taken to ensure all sub-sections (front to rear and side to side) of the mineral are in focus. These sub-sections are combined as one using the relevant image enhancing software.

I set the camera to take photos in both RAW mode and JPEG mode. When complete, the RAW photos are rendered using Canon’s excellent software package – Digital Photo Professional V4.18.0.0, by selecting tools and then activating the ‘Depth compositing’ function. The time to render the photos depends entirely on the number of shots taken and the style of shot in terms of resolution. For comparison purposes I also render the JPEG photos using Helicon Focus V8.1.1 software.

Equipment used:

CAMERA: Canon EOS M6 II, 32.5MP APS-C mirrorless with latest firmware
LENS: EFM 28mm, f/3.5 Macro IS STM with lens Hood.
TRIPOD: Joby Range Pod 1600 Tripod Kit
ADDITIONAL: ProMaster MR1 Macro Focusing Rail
 Viewed:  8442 Time(s)

01 - MALACHITE - MASHAMBA WEST - DISPLAY VIEW 1.jpg



02 - MALACHITE - MASHAMBA WEST - DISPLAY VIEW 2.jpg
 Mineral: Malachite on Dolomite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 120 mm x 90 mm x 50 mm
 Description:
The photo of this specimen was taken using my Canon EOS M6 Mark II camera using the photopeaking method. The method is very briefly outlined on page 222 of the most recent addition of the Advanced Users Guide for the Canon EOS M6 Mark II. The feature is activated using the Camera’s firmware functions also described on page 222. The Camera is mounted on a very stable tripod. I select Av on the ‘mode dial’ located on the top of Camera body and then select AF using the ‘Focus mode Switch’ control lever located on the rear of the Camera body. The method requires the focus ring on the lens assembly to be adjusted until the subject or a section of the subject is in focus. The point of focus is indicated by a red band of dots shown on the LCD image of the subject. With mineral photographs it is necessary to use the LCD ‘zoom’ function set to either x5 or x10 to see if a particular section of the subject is in focus. If not, the focus ring on the lens assembly is adjusted to achieve focus. Often when one portion of the image of the mineral is in focus other portions will be out of focus. This is fine, and a direct consequence of using the photopeaking method to photograph mineral specimens. Multiple photos (sometimes as many as 40 or more depending on the size of the specimen) are taken to ensure all sub-sections (front to rear and side to side) of the mineral are in focus. These sub-sections are combined as one using the relevant image enhancing software.

I set the camera to take photos in both RAW mode and JPEG mode. When complete, the RAW photos are rendered using Canon’s excellent software package – Digital Photo Professional V4.18.0.0, by selecting tools and then activating the ‘Depth compositing’ function. The time to render the photos depends entirely on the number of shots taken and the style of shot in terms of resolution. For comparison purposes I also render the JPEG photos using Helicon Focus V8.1.1 software.

Equipment used:

CAMERA: Canon EOS M6 II, 32.5MP APS-C mirrorless with latest firmware
LENS: EFM 28mm, f/3.5 Macro IS STM with lens Hood.
TRIPOD: Joby Range Pod 1600 Tripod Kit
ADDITIONAL: ProMaster MR1 Macro Focusing Rail
 Viewed:  8446 Time(s)

02 - MALACHITE - MASHAMBA WEST - DISPLAY VIEW 2.jpg



03 - MALACHITE - MASHAMBA WEST - MATRIX VIEW 1.jpg
 Mineral: Malachite on Dolomite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 120 mm x 90 mm x 50 mm
 Description:
The photo of this specimen was taken using my Canon EOS M6 Mark II camera using the photopeaking method. The method is very briefly outlined on page 222 of the most recent addition of the Advanced Users Guide for the Canon EOS M6 Mark II. The feature is activated using the Camera’s firmware functions also described on page 222. The Camera is mounted on a very stable tripod. I select Av on the ‘mode dial’ located on the top of Camera body and then select AF using the ‘Focus mode Switch’ control lever located on the rear of the Camera body. The method requires the focus ring on the lens assembly to be adjusted until the subject or a section of the subject is in focus. The point of focus is indicated by a red band of dots shown on the LCD image of the subject. With mineral photographs it is necessary to use the LCD ‘zoom’ function set to either x5 or x10 to see if a particular section of the subject is in focus. If not, the focus ring on the lens assembly is adjusted to achieve focus. Often when one portion of the image of the mineral is in focus other portions will be out of focus. This is fine, and a direct consequence of using the photopeaking method to photograph mineral specimens. Multiple photos (sometimes as many as 40 or more depending on the size of the specimen) are taken to ensure all sub-sections (front to rear and side to side) of the mineral are in focus. These sub-sections are combined as one using the relevant image enhancing software.

I set the camera to take photos in both RAW mode and JPEG mode. When complete, the RAW photos are rendered using Canon’s excellent software package – Digital Photo Professional V4.18.0.0, by selecting tools and then activating the ‘Depth compositing’ function. The time to render the photos depends entirely on the number of shots taken and the style of shot in terms of resolution. For comparison purposes I also render the JPEG photos using Helicon Focus V8.1.1 software.

Equipment used:

CAMERA: Canon EOS M6 II, 32.5MP APS-C mirrorless with latest firmware
LENS: EFM 28mm, f/3.5 Macro IS STM with lens Hood.
TRIPOD: Joby Range Pod 1600 Tripod Kit
ADDITIONAL: ProMaster MR1 Macro Focusing Rail
 Viewed:  8452 Time(s)

03 - MALACHITE - MASHAMBA WEST - MATRIX VIEW 1.jpg



04 - MALACHITE - MASHAMBA WEST - CLOSE UP 1.jpg
 Mineral: Malachite on Dolomite
 Locality:
Mashamba West Mine, Kolwezi District, Lualaba, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 120 mm x 90 mm x 50 mm
 Description:
This photo was taken using what I call the decelerating camera technique using an AD407Pro-3D HDMI Soldering Digital Microscope. The Microscope is adjusted so that at the top point of travel the far field is in focus while at the lowest point of travel, the near field is in focus. Movement from top to bottom allows all aspects of the specimen to be in focus during travel. The total depth of travel may be anywhere from 3 mm to 10 mm and the ‘time of travel’ varies from 3 to 5 seconds. The image of the specimen is captured as a movie in the highest video (UHD) setting possible. The video is then loaded into Helicon Focus (V8.1.0.0) for rendering, and the rendered image edited and enhanced (if necessary) using Photoshop.

Incidentally, the Microscope belongs to my partner. He uses it (read used it) for soldering Surface Mount electronic components to PCB’s. At my request he is building an automated rail attachment so that the movement of the microscope body can be better controlled with a precision stepper motor and a suitable ‘speed’ control knob. The speed of the stepper motor movement (up or down) will be set using an ATmega328 microcontroller. I can safely say that the microscope is now mine!
 Viewed:  8434 Time(s)

04 - MALACHITE - MASHAMBA WEST - CLOSE UP 1.jpg


Back to top
Reply to topic Reply with quote
Like
8
   

Forrestblyth




Joined: 21 Jun 2022
Posts: 46
Location: Ne244ly


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 02, 2023 08:37    Post subject: Re: Silvia's Collection  

Fantastic results. Very cleverly thought out techniques
Back to top
Reply to topic Reply with quote
Like
   

silvia




Joined: 10 Oct 2021
Posts: 253
Location: UK


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 02, 2023 14:57    Post subject: Re: Silvia's Collection  

Forrestblyth wrote:
Fantastic results. Very cleverly thought out techniques


Many thanks for your kind words. I enjoy passing on useful information. If I come across something that might help other collectors I feel compelled to tell. I was a teacher, and a teacher never really retires.
Back to top
Reply to topic Reply with quote
Like
2
   
Display posts from previous:   
   Index -> Women's Private Collections   All times are GMT - 5 Hours
Page 11 of 12
  Goto page Previous  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12  Next  

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2024


Powered by FMF