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Chalcopyrite Psm Siderite

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MMM32038

Chalcopyrite Psm Siderite

Description Tabs

Description
Locality: 
Carn Brea Mine, Illogan, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
4.5 × 7 × 4 cm
Description

Unusual old time specimen displaying many cavities in quartz matrix lined with lens shaped siderite crystals to 6 mm replaced with chalcopyrite.

Ex. Christy collection

Mineral Data
What's on the rock

Chalcopyrite

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White