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Quartz Psm Anhydrite

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SNJ99015

Quartz Psm Anhydrite

Description Tabs

Description
Locality: 
Animas District, San Juan County, Colorado, United States of America
Size Range: 
Cabinet (10-18 cm)
Size: 
15.5 × 12 × 4 cm
Description

 This piece is loaded with quartz after anhydrite encrustations. The andhydrite was dissolved long ago in the vein leaving the quartz. This is  one of the larger pieces that I've seen from this old Colorado locality. The back side has similar encrustations. 

Mineral Data
What's on the rock

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