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Marcasite

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JYJ733893

Marcasite

Description Tabs

Description
Locality: 
Lutz Quarry, Oshkosh, Winnebago County, Wisconsin, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 5 × 4 cm
Description

Many twinned marcasite crystals associated with colourless calcite including an old label dating to 1975. 

 

Mineral Data
What's on the rock

Marcasite

Formula: 
FeS2
Strunz: 
2.EB.10a
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 6.5