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Kobyashevite Calcite & Gypsum

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MGR625170

Kobyashevite Calcite & Gypsum

Description Tabs

Description
Locality: 
Ojuela Mine, Mapimi, Durango, Mexico
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 5.3 × 4.9 cm
Description

A rare copper-mineral named by the Russian mineralogist Stepanovich Kobyashev covered sharp terminated calcite crystals. The color is very intense green, looks much better in person - the camera was simply not able to capture the intensity of color. The assemble of the specimen is very tridimensional and attractive in each angle. There is a thin white layer on some faces - this is a micro-generation of gypsum crystals. 

Mineral Data
What's on the rock

Kobyashevite

Formula: 
Cu5(SO4)2(OH)6·4H2O
Hardness: 
2.5 - 0.0
Type Locality: 
Kapital'naya mine, Vishnevye Mts (Vishnyovye; Cherry), Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.