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Quartz Psm Anhydrite

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SNJ87094

Quartz Psm Anhydrite

Description Tabs

Description
Locality: 
Silverton, Animas, San Juan County, Colorado, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 5 × 4 cm
Description

Sharp specimen of bright white quartz after anhydrite. Cunningham Gulch and the San Juan Mountains are sources of many fine quartz epimorphs. The anhydrite was dissolved long ago leaving the quartz. Acrylic base is not included.

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
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