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Chalcopyrite & Sphalerite On Quartz

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BMM712795

Chalcopyrite & Sphalerite On Quartz

Description Tabs

Description
Locality: 
Krushev Dol Mine, Smolyan Oblast, Bulgaria
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 9 × 4 cm
Description

Lustrous golden chalkopyrite crystals grouping reaching 2.8 cm length, nestled attractively amongst colorless needle quartz crystals. Small black sphalerite crystals are also between the quartz crystals. The faces of the sphalerites are glossy and show an intense structure. Very aesthetic and undamaged!

Mineral Data
What's on the rock

Chalcopyrite

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

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Quartz

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