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Calcite & Chalcopyrite

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MGR637899

Calcite & Chalcopyrite

Description Tabs

Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 3.6 × 3.1 cm
Description

A freestanding calcite-disc attractively set on dark matrix and with amazing contrast to iridiscent tiny chalcopyrite-crystals (they show blue layer). The calcite consists of micro faces, all of them highly lustrous and sharp. The calcite os also complete backside, the specimen looks great in various positions. No significant damages to report.

Mineral Data
What's on the rock

Calcite

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

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0