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Native Bismuth Cobaltite & Erythrite

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MMM41788

Native Bismuth Cobaltite & Erythrite

Description Tabs

Description
Locality: 
Wheal Sparnon, Redruth, Cornwall, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 3.5 × 2.5 cm
Description

Massive cobaltite matrix with erythrite run through with spots of native bismuth.

A very rare old time Cornish classic.

Mineral Data
What's on the rock

Bismuth

Formula: 
Bi
Strunz: 
1.CA.05
Crystal System: 
Hexagonal
Hardness: 
2.0 - 2.5
Type Locality: 
Schneeberg District, Erzgebirge, Saxony, Germany

Cobaltite

Formula: 
CoAsS
Strunz: 
2.EB.25
Crystal System: 
Orthorhombic - Pyramidal
Hardness: 
5.5

Erythrite

Formula: 
Co3(AsO4)2·8H2O
Strunz: 
8.CE.40
Hardness: 
1.5 - 2.5
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany
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