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Quartz Psm Anhydrite

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SNJ93825

Quartz Psm Anhydrite

Description Tabs

Description
Locality: 
Animas District, San Juan County, Colorado, United States of America
Size Range: 
Museum (18cm plus)
Size: 
10 × 19.5 × 5.6 cm
Description

This specimen consists of over 2 dozen intergrown quartz after anhydrite encrustations.

The anhydrite was dissolved in situ leaving casts. The San Juans have produced some fine epimorphs such as this.

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