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Sphalerite Galena & Quartz

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CFL958246

Sphalerite Galena & Quartz

Description Tabs

Description
Locality: 
Madan, Smolyan Oblast, Bulgaria
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 5.8 × 5 cm
Description

Very nice specimen of translucent to gemmy sphalerite crystals, cleiophane variety, associated with galena and quartz.  Some of the sphalerite and galena crystals are twinned.  Possibly from the Septemvri Mine.  Purchased in 1998.

Mineral Data
What's on the rock

Sphalerite

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

Galena

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

Quartz

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

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