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Chalcopyrite With Quartz & Calcite

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BMM944758

Chalcopyrite With Quartz & Calcite

Description Tabs

Description
Locality: 
Borieva Mine, Madan, Smolyan Oblast, Bulgaria
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 6 × 3.5 cm
Description

Beautiful piece with remarkably large chalcopyrite crystals. What’s extraordinary about this piece are the amazing metallic iridescent patina with violet and blue shades in combination with the deep golden color. Single quartz crystals and a larger calcite crystal enrich this specimen!

Mineral Data
What's on the rock

Chalcopyrite

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

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