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Quartz With Galena & Sphalerite & Chalcopyrite & Pyrite

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BMM1020085

Quartz With Galena & Sphalerite & Chalcopyrite & Pyrite

Description Tabs

Description
Locality: 
Deveti Septemvri Mine, Smolyan Oblast, Bulgaria
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 10.3 × 3.5 cm
Description

This piece shows the five main minerals of Madan in a balanced combination: gray metallic shiny galena cubes up to over 3 cm and transparent, high-gloss quartz crystals up to 2 cm grown on quartz ore matrix. The high-gloss black sphalerites and the high-gloss golden pyrites provide a good contrast. Dull shiny chalcopyrite is the fifth mineral on this piece. Really impressive - the back is cut.

Mineral Data
What's on the rock

Quartz

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

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Sphalerite

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

Chalcopyrite

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

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5