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Polydymite & Calcite

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ESM547916

Polydymite & Calcite

Description Tabs

Description
Locality: 
Gray Quarry, Hamilton, Hancock County, Illinois, United States of America
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 4.3 × 2.3 cm
Description

Polydymite inclusions in a calcite cleavage

Mineral Data
What's on the rock

Polydymite

Formula: 
Ni2+Ni3+2S4
Strunz: 
2.DA.05
Crystal System: 
Isometric
Hardness: 
4.5 - 5.5
Type Locality: 
Grüneau Mine (Grüne Au Mine; Grünau Mine), Schutzbach, Betzdorf, Siegerland, Rhineland-Palatinate, Germany

Calcite

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