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Quartz Psm Anhydrite

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SNJ98361

Quartz Psm Anhydrite

Description Tabs

Description
Locality: 
Animas District, San Juan County, Colorado, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 5 × 3.8 cm
Largest Crystal: 
3.70cm
Description

 This is a quartz encrustation after anhydrite. The anhydrite has been long dissolved. Numerous somewhat delicate crystals protrude from the matrix in different directions, creating an interesting specimen.

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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