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Calcite On Quartz Psm Anhydrite

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SNJ93572

Calcite On Quartz Psm Anhydrite

Description Tabs

Description
Locality: 
Animas District, San Juan County, Colorado, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
6.7 × 8.7 × 5 cm
Description

 A solid covering of scalenohedral calcite crystals coat this quartz encrustation of anhydrite. The anhydrite has been dissolved long ago in the vein. I have removed the calcite on a couple of similar pieces and a fine specimen of quartz psm anhydrite was the result. There is slight damage at a couple of edges.

Mineral Data
What's on the rock

Calcite

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Anhydrite

Formula: 
CaSO4
Strunz: 
7.AD.30
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Type Locality: 
Salt mine, Hall valley, Hall, Innsbruck, Inn valley, North Tyrol, Tyrol, Austria
sanjuanmtnrocks
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