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Anthracite?

Posted by Hervé Osana

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Hervé Osana

Anthracite?
May 23, 2012 12:09AM

Registered: 1 year ago
Posts: 14

I would like you'r suggesting about this sample
I 'd found this one under icemount "Les Bossons" near at Chamonix town
It mean carbon but there is a crystal included. we can observ in clos-up a mix of colored micro-crystals
Perhaps whith picture quality, it's visual effect. I can't do perfectly more
Thank you

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Rock Currier

Re: Anthracite?
May 23, 2012 09:12PM

Registered: 7 years ago
Posts: 8,471

I have not a clue.

Rock Currier
Crystals not pistols.

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Sergey Sayamov

Re: Anthracite?
May 24, 2012 05:01AM

Registered: 7 years ago
Posts: 461

Crystal looks like a weathered sulfide with tarnish...Tarnish makes the effect of many colorful dots - it doesn't look like there're mix of microcrystals. Due to the base colour - pyrite maybe?

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Ronald John Gyllenhammer

Re: Anthracite?
May 24, 2012 03:01PM

Registered: 7 years ago
Posts: 1,315

Hematite?

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Erik Vercammen

Re: Anthracite?
May 24, 2012 04:23PM

Registered: 3 years ago
Posts: 523

Pyrite is very common in coal layers. It may cause self-ignition of the coal when it oxidizes and gives heat, and a lot of secondary sulfates are found in coalmines.

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