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Boyleite & Sphalerite

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ESM591103

Boyleite & Sphalerite

Description Tabs

Description
Locality: 
Kropbach, Staufen im Breisgau, Freiburg Region, Baden-Württemberg, Germany
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 4 × 2.5 cm
Description

White crust of boyleite on sphalerite

Mineral Data
What's on the rock

Boyleite

Formula: 
(Zn,Mg)SO4·4H2O
Strunz: 
7.CB.15
Crystal System: 
Monoclinic
Hardness: 
2.0
Type Locality: 
Porphyry quarry, Kropbach, Münstertal, Black Forest, Baden-Württemberg, Germany

Sphalerite

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