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Pyrite Chalcopyrite & Dolomite

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BMM553340

Pyrite Chalcopyrite & Dolomite

Floater

Description Tabs

Description
Locality: 
Sweetwater Mine, Ellington, Reynolds County, Missouri, United States of America
Class: 
Mixed Specimens
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 5.5 × 4 cm
Description

Metallic pyrite crystals with bronze-colored surface patina. Reddish purple and dark blue iridescent crystals of chalcopyrite and some white dolomites are crystallized on the pyrite crystals. Colorful floater, undamaged.

Mineral Data
What's on the rock

Pyrite

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

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White