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Chalcocite & Malachite Psm Fossil Wood

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CLB617912

Chalcocite & Malachite Psm Fossil Wood

Pseudomorph

Description Tabs

Description
Locality: 
Nacimiento Mine, San Pablo, Sandoval County, New Mexico, United States of America
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3.9 × 2.5 cm
Description

Very nice piece of fossil wood, replaced by chalcocite. The chalcocite in turn has superficially altered to malachite in some places.

Those fossilized logs were used as ore, most of them melted down for the copper. Nowadays this material is very scarce and sought after. As far as I know this is the only locality which had this kind of chalcocite-after-wood pseudomorph.

Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

Wood

Variety Of: 

Plant

Seller Information

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