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Millerite & Pyrite

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JYJ733884

Millerite & Pyrite

Description Tabs

Description
Locality: 
Keokuk, Lee County, Iowa, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 5.3 × 3.4 cm
Description

Coated millerite on pyrite associated with large calcite in a geode filled by quartz crystals. 

Comes with an old label. 

 

Mineral Data
What's on the rock

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Pyrite

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