FMF - Friends of Minerals Forum, discussion and message board

[Carles Millan]

[Ed Huskinson]

Thanks Carles! I went to the url you provided and was able to take a good close look at piece 6349M. What a beauty it is indeed!!! You can see right through the crystal to the matrix below. Looks like the crystal has been deposited on a matrix of carbonate (limestone or dolomite) breccia. It is actually possible to study the underlying matrix (spacing and size of the fragments, things like that) through the crystal itself. Wow!

The piece I had in mind is similar, on a single piece of similar/same matrix, but without the breccia (or whatever) fragments. I believe it was a slightly darker colour as well, darker grey, not quite black.

Probably similar vintage though.

Thanks for the reply, and the opportunity to look at your stuff.

Oh, and congratulations on your freebie display cabinets. Woo Hoo!!!

Later,

Ed

[Carles Millan]

[Carles Millan]

Quartz, hematite

Group of quartz and hematite crystals. Overall size: 140 mm x 110 mm. Weight: 849 g.

Jinlong hill, Lungchuan, Heyuan, Guangdong, China.

This specimen is no longer in my collection.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified. Creative Commons Attribution Licence - Some Rights Reserved.

[Carles Millan]

Quartz, hematite

Another view of the previous specimen.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited. Creative Commons Attribution License - Some Rights Reserved.

[jaysminerals]

Hi Carles

Very nice specimens you add from day to day. Especially the last one ( https://www.mineral-forum.com/message-board/viewtopic.php?p=18366#18366 ) is a phantastic piece. Can you shoot me a private message how much a piece like this is. I want to look for something like that in Munich and want to know what prices (at least a range) are on pieces like this.
Thanks.

[Carles Millan]

Pyrite, quartz, calcite?

Group of pyrite crystals on quartz. Overall size: 71 mm x 52 mm. Main pyrite crystal: 31 mm wide, 29 mm on edge. Weight: 149 g. The crack that is visible in the photos seems to be natural, not man made, likely caused by very old tectonic movements. Among the quartz there are other crystals, colorless and transparent, with rhombohedral habit, that might be calcite or dolomite.

The crystallography of this specimen is very interesting. The main crystal is basically an octahedron {111} but also shows pyritohedron {210} and rhombododecahedron {110} faces. Although octahedrons and pyritohedrons are quite usual in pyrite crystals, rhombododecahedrons are really rare. Please see more details about the habit in one of the photos below.

Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited. Creative Commons Attribution License - Some Rights Reserved.

My Personal Site

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2789M-pyrite.jpg
Description:	Pyrite, quartz, calcite? Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru 71 mm x 52 mm
Viewed:	50614 Time(s)

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2789M-pyrite1.jpg
Description:	Pyrite, quartz, calcite? Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru 71 mm x 52 mm
Viewed:	50556 Time(s)

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2789M-pyrite2.jpg
Description:	Pyrite, quartz, calcite? Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru 71 mm x 52 mm
Viewed:	50547 Time(s)

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2789-pyrite3.jpg
Description:	Pyrite, quartz, calcite? Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru 71 mm x 52 mm Pay attention to the octahedron {111}, pyritohedron {210} and the uncommon (in pyrite) rhombododecahedron {110} faces. Anyone interested to learn what the Miller indices are can get a primer from the Wikipedia at http://en.wikipedia.org/wiki/Miller_index
Viewed:	50617 Time(s)

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[Jason]

Very nice pyrite spec. Carles!

[Carles Millan]

[Carles Millan]

Cassiterite, beryl, muscovite

Cassiterite complex crystal set on a matrix of gemmy colorless beryl with some well formed, projecting up, bladed muscovite crystals. Although not well defined in the photograph, in the front side there are about 18 single beryl crystals plus about 11 more on the back. Overall size: 81 mm x 57 mm. Cassiterite crystal: 31 mm wide. Main beryl crystal: 22 mm wide. Weight: 169 g. It's almost a floater. Undamaged.

Mt Xuebaoding, Pingwu Co., Mianyang Prefecture, Sichuan Province, China.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited. Creative Commons Attribution License - Some Rights Reserved.

[Jason]

Holy moly..that is a pristine specimen..well done on that one carles!!! Wow

[Carles Millan]

Baryte

Group of transparent tabular Baryte crystals. Overall size: 102 mm x 56 mm. Main crystal: 30 mm x 23 mm. Weight: 188 g. Undamaged.

Cerro Huarihuyn, Miraflores, Huamalíes Province, Huánuco Department, Peru.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited. Creative Commons Attribution License - Some Rights Reserved.

My Personal Site

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6161C-barite.jpg
Description:	Baryte Cerro Huarihuyn, Miraflores, Huamalíes Province, Huánuco Department, Peru 102 mm x 56 mm. Main crystal: 30 mm x 23 mm Close up view
Viewed:	48545 Time(s)

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6161M-barite.jpg
Description:	Baryte Cerro Huarihuyn, Miraflores, Huamalíes Province, Huánuco Department, Peru 102 mm x 56 mm. Main crystal: 30 mm x 23 mm
Viewed:	48392 Time(s)

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6161M-barite1.jpg
Description:	Baryte Cerro Huarihuyn, Miraflores, Huamalíes Province, Huánuco Department, Peru 102 mm x 56 mm. Main crystal: 30 mm x 23 mm
Viewed:	48556 Time(s)

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6161M-barite2.jpg
Description:	Baryte Cerro Huarihuyn, Miraflores, Huamalíes Province, Huánuco Department, Peru 102 mm x 56 mm. Main crystal: 30 mm x 23 mm
Viewed:	48543 Time(s)

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[Carles Millan]

Schorl, elbaite, albite

Group of two parallel schorl crystals with elbaite termination, associated to albite. Their color is black except for the tips, where a zone of about 3 mm is translucent dark green. Overall size: 63 mm x 31 mm. Widest crystal: 12 mm wide. Tallest crystal: 63 mm tall. Weight: 33 g.

Bulochi, Astor valley, Astor District, Gilgit-Baltistan, Pakistan. It is a hamlet in an area that is very rich in minerals of pegmatitic origin (Mindat: https://www.mindat.org/loc-7682.html ).

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited. Creative Commons Attribution License - Some Rights Reserved.

[Carles Millan]

Schorl, quartz

Single terminated schorl prism with two quartz crystals grown at the bottom. Schorl size: 109 mm long, 10 mm wide. Main quartz size: 41 mm long.

Dassu area, Shigar Valley, Skardu District, Gilgit-Baltistan, Pakistan.

Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified. Creative Commons Attribution Licence - Some Rights Reserved.

[Tobi]

Hi Carles, once again all of your specimens proof that you have a good taste concerning fine minerals. Very nice, especially the Erongo aquamarine! ( https://www.mineral-forum.com/message-board/viewtopic.php?p=18366#18366 )