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Galena Marcasite Sphalerite & Selenite

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KCM99456

Galena Marcasite Sphalerite & Selenite

Description Tabs

Description
Locality: 
Tri-State District, Missouri, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.5 × 4.8 × 2.7 cm
Description

Lustrous marcasite crystals are on modified galena crystals. Also in association are sphalerite and selenite crystals (which were fairly uncommon from the Tri-State District).

Mineral Data
What's on the rock

Galena

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

Marcasite

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

Sphalerite

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

Selenite

Variety Of: 

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Hardness: 
0.0
Kevin Conroy Minerals