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Quartz Psm Anhydrite

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SNJ168404

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: 
8 × 5.5 × 3 cm
Description

This is a bright white quartz epimorph from the San Juans, known for it's production of such specimens. This piece is covered with dozens of these encrustations.

The anhydrite has been dissolved long ago leaving the quartz cast.

A couple of crystals are "dinged" but do not detract from the aesthetics.

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