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Enargite & Pyrite

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SCH178582

Enargite & Pyrite

Description Tabs

Description
Locality: 
Butte, Silver Bow County, Montana, United States of America
Size Range: 
Cabinet (10-18 cm)
Size: 
17.7 × 10.5 × 6.1 cm
Description

A druse of colorless quartz crystals is the matrix and contrast for striated, jet black enargite wedge-shaped prisms, some of them are doubly-terminated and nicely accented by brass-yellow pyrite. A few covellite blades are present in one corner.Superb large plate in outstanding shape with very minor damage only in the very edges which could be trimmed.Mined in 1950's, this is classic material and comes with several labels, including Harvard University and Phil Scalisi's.

Mineral Data
What's on the rock

Enargite

Formula: 
Cu3AsS4
Strunz: 
2.KA.05
Crystal System: 
Orthorhombic
Hardness: 
3.0
Streak: 
Black.
Type Locality: 
San Francisco vein, Morococha District, Yauli Province, Junín Department, Peru

Pyrite

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

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