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Quartz Psm Calcite

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SNJ102539

Quartz Psm Calcite

Description Tabs

Description
Locality: 
Animas District, San Juan County, Colorado, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.8 × 8 × 6.5 cm
Largest Crystal: 
2.50cm
Description

 This is from a locality that has yielded numerous diverse epimorphs of quartz after calcite, fluorite and barite. This specimen features a prominent twinned scalenohedral calcite crystal that has been quartz encrusted. The calcite was then dissolved in the vein.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White
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