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Silvia's Collection
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silvia




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PostPosted: Dec 12, 2021 15:02    Post subject: Unusal Fluorapatite - Silvia's Collection  

Cluster of satiny lustrous translucent prismatic Fluorapatite crystals measuring to 3 cm in size with micro crystallized Topaz, Muscovite and Goyazite. Topaz and Goyazite verified by SEM and XRD.

The Fluorapatite crystals display a ‘mild’ orange fluorescence in the presence of UVA light – not as strong as the fluorescence exhibited by the green crystals of Fluorapatite.



01 - FLUOROAPATITE WITH TOPAZ.jpg
 Mineral: Fluorapatite, Topaz, Goyazite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 4 cm x 3 cm x 3 cm
 Description:
 Viewed:  1457 Time(s)

01 - FLUOROAPATITE WITH TOPAZ.jpg



02 - FLUOROAPATITE WITH TOPAZ.jpg
 Mineral: Fluorapatite, Topaz, Goyazite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 4 cm x 3 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1454 Time(s)

02 - FLUOROAPATITE WITH TOPAZ.jpg



03 - FLUOROAPATITE WITH TOPAZ.jpg
 Mineral: Fluorapatite, Topaz, Goyazite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 4 cm x 3 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1455 Time(s)

03 - FLUOROAPATITE WITH TOPAZ.jpg



04 - FLUOROAPATITE WITH TOPAZ.jpg
 Mineral: Fluorapatite, Topaz, Goyazite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 4 cm x 3 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1459 Time(s)

04 - FLUOROAPATITE WITH TOPAZ.jpg


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Jordi Fabre
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PostPosted: Dec 15, 2021 05:15    Post subject: Re: Silvia's Collection  

silvia wrote:

Cluster of satiny lustrous translucent prismatic Fluorapatite crystals measuring to 3 cm in size with micro crystallized Topaz, Muscovite and Goyazite. Topaz and Goyazite verified by SEM and XRD....


Hi Silvia,

Some photo detail of the Goyazite please, or too small?
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silvia




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PostPosted: Dec 15, 2021 15:50    Post subject: Re: Silvia's Collection  

Hello Jordi:

The specimen came with a label that stated Goyazite. I have no reason to doubt the analysis, but I am more than happy to organize another SEM/XRD analysis to be positively sure. My partner will look at it under the microscope in the meantime.
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silvia




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PostPosted: Dec 18, 2021 15:30    Post subject: Panasqueira Pictures - Silvia's Collection  

More about Panasqueira

In 1886 the first prospecting licence at Panasqueira was granted, and the first reference to wolframite occurred in 1888. In 1896 a mining company was formed to exploit the deposit. Underground mining operations at Panasqueira have been continuous since 1896, except for a brief period at the end of World War II and a second closure in the mid-1990s.

From 1937 to 2018 a total of 42 million tonnes of rock have been extracted from the Panasqueira ore-body. This rock has produced approximately 132,000 tonnes of tungsten concentrate, 7,100 tonnes of tin concentrate and 34,000 tonnes of copper concentrate.

Despite 100 years of near continuous mining, very little primary exploration has been done outside the active or past mine workings.
Several anomalous areas of elevated tungsten and tin geochemistry were established by a regional stream sediment geochemical survey carried out between from 1982 to 1984 by Beralt. However a “true” exploration of the concession and the area immediately surrounding the concession seems to have been fairly limited.

It is worth noting that the hills surrounding the mine contain many old pits and shafts left from the days of past hand mining operations.



LEVELS SIGN.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
All levels lead to more levels
 Viewed:  1248 Time(s)

LEVELS SIGN.jpg



TO LEVEL 1.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
Typical drive, about 2.2 metres high.
 Viewed:  1245 Time(s)

TO LEVEL 1.jpg



UNDERGROUND ADIT LEVEL 3.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
Another drive
 Viewed:  1243 Time(s)

UNDERGROUND ADIT LEVEL 3.jpg



UNDERGROUND ADIT LEVEL 1B.jpg
 Mineral: -
 Description:
More drives.
 Viewed:  1245 Time(s)

UNDERGROUND ADIT LEVEL 1B.jpg



UNDERGROUND ADIT LEVEL 1.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
 Viewed:  1244 Time(s)

UNDERGROUND ADIT LEVEL 1.jpg



UNDERGROUND LEVEL 2.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
Level 2
 Viewed:  1244 Time(s)

UNDERGROUND LEVEL 2.jpg



RAISE BORER.jpg
 Mineral: -
 Description:
drilling more ore chutes - from the bottom up
 Viewed:  1245 Time(s)

RAISE BORER.jpg



INSIDE MINE.jpg
 Mineral: -
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Description:
 Viewed:  1247 Time(s)

INSIDE MINE.jpg


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silvia




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PostPosted: Dec 19, 2021 14:06    Post subject: Fluoroapatite - Silvia's Collection  

The specimen comprises a cluster of gemmy Fluorapatite crystals measuring to 3 cm in width, along with minor Siderite, Arsenopyrite, and Muscovite.


01 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg
 Mineral: Fluorapatite, Siderite, Arsenopyrite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 5 cm x 3 cm
 Description:
 Viewed:  1171 Time(s)

01 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg



02 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg
 Mineral: Fluorapatite, Siderite, Arsenopyrite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 5 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1172 Time(s)

02 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg



03 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg
 Mineral: Fluorapatite, Muscovite
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 5 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1173 Time(s)

03 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg



04 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg
 Mineral: Fluorapatite, Siderite, Quartz
 Locality:
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
 Dimensions: 6 cm x 5 cm x 3 cm
 Description:
Detail of the crystals
 Viewed:  1172 Time(s)

04 - FLUORAPATITE SIDERITE, ARSENOPYRITE, MUSCOVITE.jpg


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silvia




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PostPosted: Dec 26, 2021 18:18    Post subject: Dal'negorsk Minerals - Silvia's Collection  

Sharp pseudo-hexagonal crystals of Pyrrhotite to 6 cm in size with lustrous black complex Sphalerite crystals to 4 cm. Minor Quartz present as well.


01 - Dal'negorsk A.jpg
 Mineral: Pyrrhotite, Sphalerite, Quartz
 Locality:
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Russia
 Dimensions: 12 cm x 9 cm x 8 cm
 Description:
 Viewed:  1003 Time(s)

01 - Dal'negorsk A.jpg



02 -Dal'negorsk.jpg
 Mineral: Pyrrhotite, Sphalerite, Quartz
 Locality:
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Russia
 Dimensions: 12 cm x 9 cm x 8 cm
 Description:
Detail of the crystals.
 Viewed:  1002 Time(s)

02 -Dal'negorsk.jpg



03 - Dal'negorsk.jpg
 Mineral: Pyrrhotite, Sphalerite, Quartz
 Locality:
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Russia
 Dimensions: 12 cm x 9 cm x 8 cm
 Description:
Detail of the crystals.
 Viewed:  1002 Time(s)

03 - Dal'negorsk.jpg



04 - Dal'negorsk.jpg
 Mineral: Pyrrhotite, Sphalerite, Quartz
 Locality:
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Russia
 Dimensions: 12 cm x 9 cm x 8 cm
 Description:
Detail of the crystals
 Viewed:  1004 Time(s)

04 - Dal'negorsk.jpg



05 - Dal'negorsk.jpg
 Mineral: Pyrrhotite, Sphalerite, Quartz
 Locality:
Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Russia
 Dimensions: 12 cm x 9 cm x 8 cm
 Description:
Detail of the crystals.
 Viewed:  1005 Time(s)

05 - Dal'negorsk.jpg


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PostPosted: Jan 03, 2022 18:55    Post subject: Viloco Cassiterite - Silvia's Collection  

The specimen contains incredibly lustrous sharp black crystals of Cassiterite to 35 mm in size across the front of this matrix with minor Quartz.


BOLIVIAN CASSITERITE 1A.jpg
 Mineral: Cassiterite, Quartz
 Locality:
Viloco Mine, Loayza Province, La Paz Department, Bolivia
 Dimensions: 14 cm x 13 cm x 7 cm
 Description:
Display side
 Viewed:  831 Time(s)

BOLIVIAN CASSITERITE 1A.jpg



BOLIVIAN CASSITERITE 2.jpg
 Mineral: Cassiterite, Quartz
 Locality:
Viloco Mine, Loayza Province, La Paz Department, Bolivia
 Dimensions: 14 cm x 13 cm x 7 cm
 Description:
Matrix side
 Viewed:  829 Time(s)

BOLIVIAN CASSITERITE 2.jpg



VILOCO CASSITERITE CLOSE 1.jpg
 Mineral: Cassiterite, Quartz
 Locality:
Viloco Mine, Loayza Province, La Paz Department, Bolivia
 Dimensions: 14 cm x 13 cm x 7 cm
 Description:
Detail of the crystals
 Viewed:  830 Time(s)

VILOCO CASSITERITE CLOSE 1.jpg



VILOCO CASSITERITE CLOSE 2.jpg
 Mineral: Cassiterite, Quartz
 Dimensions: 14 cm x 13 cm x 7 cm
 Description:
Detail of the crystals
 Viewed:  829 Time(s)

VILOCO CASSITERITE CLOSE 2.jpg



VILOCO CASSITERITE CLOSE 3.jpg
 Mineral: Cassiterite, Quartz
 Locality:
Viloco Mine, Loayza Province, La Paz Department, Bolivia
 Dimensions: 14 cm x 13 cm x 7 cm
 Description:
Detail of the crystals
 Viewed:  828 Time(s)

VILOCO CASSITERITE CLOSE 3.jpg


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silvia




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PostPosted: Jan 08, 2022 16:37    Post subject: Photographing Minerals – A Tale of Frustration - Silvia's Collection  

Photographing Minerals – A Tale of Frustration

I thought it would be nice to share some of my adventures with the digital camera. I am not a professional photographer – just barely an amateur one, but I have managed to take some nice photos of some of my minerals.

Polite and constructive criticisms welcome.

Camera

The camera I have used is a Nikon Coolpix A100. It has a 20.1 megapixels sensor, a wide zoom of 5X and a dynamic fine zoom of 10X. Note that I never use the zoom feature when photographing minerals. It has a LCD screen 55 mm long and 42 mm wide. When photographing minerals, this LCD becomes my defacto eye. I never look at the mineral, rather I use the LCD display to show me what the camera sees. If the mineral looks good in the LCD, the camera will take a nice shot. The camera is attached to an appropriate tripod.

Light Box

For most minerals I use a light box made of bright white plastic. It has an LED illuminator that runs off a 5VDC power supply. It is approximately 30 cm x 30 cm x 30 cm in size with a circular detachable top lid. When photographing minerals I flood this light box with light from three to four 240V globes. When the specimen is too large to fit in the box or the box does not give a good photo I will use my computer desk with the appropriate background – white or black cotton sheet.

Light Source

I use 240V/50Hz, 12W E27 globes that emit light described as ‘daylight’ (5500K to 6500K) by the supplier. Each globe is mounted in a lamp fitting that clips to the top of my computer desk.

When using the lamps all exterior light is excluded. The room is dark, and the only light comes from the lamps.

Software

Any photo editing software package can be used, such as Photoshop, Luminar AI, Adobe light room, Aurora HDR and many others. I often use a very early edition of Adobe Photoshop, circa 2010.

Miscellaneous

This includes all and anything I use to get a good photo – blocks of wood, plastic, metal or rubber to support the specimen. Sheets of folded aluminium foil to reflect light and white plastic from discarded milk containers to diffuse the light.

An example

Pyrite, Marcasite and Pyrrhotite are annoying to photograph. You can often get a very nice photograph with every aspect of the mineral in focus, but it lacks the tones that the eye sees in the specimen. I often ask where are the beautiful yellow tones of Pyrite and the bronze velvet tones of Pyrrhotite that I can see in the specimen.

I decided to use the photograph of the specimen of Sphalerite with Pyrrhotite from Dal'negorsk, Russia as an example. I had no success using my light box to photograph the specimen. Many of the photographs taken were in focus with great depth of field but they looked nothing like the specimen I had in my cabinet. So I set up my computer desk to take the photo. I used a white cotton sheet for the background, and I positioned the lights until what I saw in the LCD was what I wanted to photograph.

I used the automatic focus feature of the camera. This places a green box around that part of the subject the camera deems to be in focus. When almost in focus you get a yellow box, and when not in focus a small red box appears in the camera’s LCD.
Sometimes only part of the mineral was in focus, so I made small adjustments to the position of the lights, the location of the camera and the position of any reflectors or diffusers used to take the photograph, until the whole specimen was within the green focus box. And then I took the photograph, and continued with the process until I was happy with all the photographs taken.

Detail of Camera settings.

1. Camera is a CoolPix A100
2. Specimen 15 cm from camera lens
3. Image Mode 20w – 5152 x 3864 pixel resolution
4. White Balance set to auto
5. Continuous mode set to Single
6. ISO sensitivity set to Auto
7. AF area mode set to Target finding AF
8. Autofocus mode set to AF-F Full-time AF
9. Macro mode on
10. Flash set to off
11. Scene set to Auto mode



COOLPIX A100.jpg
 Mineral: _
 Description:
The camera used to create all my FMF mineral photos.
 Viewed:  720 Time(s)

COOLPIX A100.jpg



Light Tent 30 cm x 30 cm x 30 cm.jpg
 Mineral: _
 Description:
Light box - ex China with detachable top lid. Can be folded up for storage if needed.
 Viewed:  720 Time(s)

Light Tent 30 cm x 30 cm x 30 cm.jpg



LAMPS.jpg
 Mineral: _
 Description:
The lamps I always use. Standard house globes that emit daylight light.
 Viewed:  719 Time(s)

LAMPS.jpg



Dal'negorsk Photo.jpg
 Mineral: _
 Description:
The mineral used for the example. When in focus a green box appears around that part of the subject the camera sensor deems is in focus.
 Viewed:  729 Time(s)

Dal'negorsk Photo.jpg


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silvia




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PostPosted: Jan 11, 2022 15:11    Post subject: Calcite - Silvia's Collection  

A large cabinet specimen with a ‘ball’ of Calcite 16 cm in diameter set on a crystallized Quartz matrix containing gemmy Quartz crystals covered in Calcite.


01 - CALCITE QUARTZ.jpg
 Mineral: Calcite, Quartz, Pyrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 22 cm x 19 cm x 11 cm
 Description:
Display view
 Viewed:  591 Time(s)

01 - CALCITE QUARTZ.jpg



02 - CALCITE QUARTZ - REAR.jpg
 Mineral: Calcite, Quartz, Pyrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 22 cm x 19 cm x 11 cm
 Description:
Rear view - matrix side
 Viewed:  591 Time(s)

02 - CALCITE QUARTZ - REAR.jpg



03 - CALCITE QUARTZ.jpg
 Mineral: Calcite, Quartz, Pyrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 22 cm x 19 cm x 11 cm
 Description:
Detail of the ball of Calcite
 Viewed:  591 Time(s)

03 - CALCITE QUARTZ.jpg



05 - CALCITE QUARTZ.jpg
 Mineral: Calcite, Quartz, Pyrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 22 cm x 19 cm x 11 cm
 Description:
Detail of the Calcite covered Quartz crystals
 Viewed:  591 Time(s)

05 - CALCITE QUARTZ.jpg


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silvia




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PostPosted: Jan 15, 2022 16:21    Post subject: Chalcostibite - Silvia's Collection  

A cabinet size example with sparkling metallic crystals of Chalcostibite to 0.5 cm in size forming clusters to 2 centimetres across on a crystallized quartz matrix with minor Tetrahedrite.


01 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Display side
 Viewed:  497 Time(s)

01 - Chalcostibite, Quartz, Tetrahedrite.jpg



02 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Matrix side
 Viewed:  497 Time(s)

02 - Chalcostibite, Quartz, Tetrahedrite.jpg



03 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Detail of the crystals
 Viewed:  497 Time(s)

03 - Chalcostibite, Quartz, Tetrahedrite.jpg



04 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Detail of the crystals
 Viewed:  497 Time(s)

04 - Chalcostibite, Quartz, Tetrahedrite.jpg



05 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Detail of the crystals
 Viewed:  499 Time(s)

05 - Chalcostibite, Quartz, Tetrahedrite.jpg



06 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
Detail of the crystals
 Viewed:  498 Time(s)

06 - Chalcostibite, Quartz, Tetrahedrite.jpg



07 - Chalcostibite, Quartz, Tetrahedrite.jpg
 Mineral: Chalcostibite, Quartz, Tetrahedrite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 4 cm
 Description:
 Viewed:  497 Time(s)

07 - Chalcostibite, Quartz, Tetrahedrite.jpg


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Tobi
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PostPosted: Jan 17, 2022 04:02    Post subject: Re: Silvia's Collection  

Hi Silvia,

really good and showy specimens from Cavnic. I like Romanian minerals and especially Cavnic, a wonderful locality for quartz and sulfide fans - I am both :-)

Regards
Tobi
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PostPosted: Jan 17, 2022 22:53    Post subject: Re: Silvia's Collection  

Tobi wrote:
Hi Silvia,

really good and showy specimens from Cavnic. I like Romanian minerals and especially Cavnic, a wonderful locality for quartz and sulfide fans - I am both :-)

Regards
Tobi


Many thanks for the encouraging words.

My partner and I are great fans of sulphide minerals too. We love Romanian minerals. It is a very beautiful country with lots of history and folklore and lots of great minerals too.
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silvia




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PostPosted: Jan 20, 2022 16:49    Post subject: Romanian Tetrahedrite - Silvia's Collection  

Lustrous metallic sharp tetrahedral crystals of Tetrahedrite to 1 cm in size across the top of a crystallized quartz matrix with pyrite.


01 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Display view
 Viewed:  213 Time(s)

01 -  TETRAHEDRITE - BOLDUT.jpg



02 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Matrix view
 Viewed:  211 Time(s)

02 -  TETRAHEDRITE - BOLDUT.jpg



03 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Detail of the crystals
 Viewed:  212 Time(s)

03 -  TETRAHEDRITE - BOLDUT.jpg



04 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Detail of the crystals
 Viewed:  211 Time(s)

04 -  TETRAHEDRITE - BOLDUT.jpg



05 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Detail of the crystals
 Viewed:  211 Time(s)

05 -  TETRAHEDRITE - BOLDUT.jpg



06 - TETRAHEDRITE - BOLDUT.jpg
 Mineral: Tetrahedrite, Pyrite, Quartz, Sphalerite
 Locality:
Boldut Mine, Cavnic mining area, Cavnic, Maramures, Romania
 Dimensions: 15 cm x 12 cm x 5 cm
 Description:
Detail of the crystals
 Viewed:  211 Time(s)

06 -  TETRAHEDRITE - BOLDUT.jpg


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Bergur_E_Sigurdarson




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PostPosted: Jan 20, 2022 17:07    Post subject: Re: Silvia's Collection  

You have a wonderful collection... and I really appreciate you posting images from serveral parts, details and especially the back of your specimens.
As you say, they often add important info about the way the piece formed and give an idea of the matrix and material the location should be known for.

(I have over my time collecting sometimes bought pieces, where origin isn't clear, and having similar pieces to compare to, not just the crystals, but the matrix can be invaluable in trying to determine a more specific location than given by the vendor)
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Tobi
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PostPosted: Jan 21, 2022 04:07    Post subject: Re: Silvia's Collection  

Bergur_E_Sigurdarson wrote:
You have a wonderful collection... and I really appreciate you posting images from serveral parts, details and especially the back of your specimens.
As you say, they often add important info about the way the piece formed and give an idea of the matrix and material the location should be known for.
Silvia, I think I mentioned this before but I have to say it again and agree with Bergur: You are not just showing your collection, you are telling stories and teaching geology and mining history. Highly informative and always a pleasure, you are such an enrichment for this forum!

Best regards
Tobi
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silvia




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PostPosted: Jan 21, 2022 16:13    Post subject: Re: Silvia's Collection  

Tobi wrote:
Bergur_E_Sigurdarson wrote:
You have a wonderful collection... and I really appreciate you posting images from serveral parts, details and especially the back of your specimens.
As you say, they often add important info about the way the piece formed and give an idea of the matrix and material the location should be known for.
Silvia, I think I mentioned this before but I have to say it again and agree with Bergur: You are not just showing your collection, you are telling stories and teaching geology and mining history. Highly informative and always a pleasure, you are such an enrichment for this forum!

Best regards
Tobi


Many thanks Bergur and Tobi for your kind words.

For me collecting minerals is not just about good aesthetics, it is about everything associated with the mineral – locality, history, geography, geology, mineralogy and the people. Panasqueira has been very good to me. Great minerals from a still active mine with lots of history. My partner and I also collect material from many worldwide locations, but our European collection contains the most information about the mines and the localities.

I was a teacher, and it is hard to get out of the habit!

Best Regards to all.
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