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Bismuthinite & Wood Tin

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MMM61445

Bismuthinite & Wood Tin

Description Tabs

Description
Locality: 
Fowey Consols, Tywardreath, Cornwall, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 2.5 × 2.5 cm
Description

Quartz matrix with bright needles of bismuthinite to 1 cm.

The matrix is partly covered in wood tin spheres some of these are broken revealing a dark core with a radiating structure, quite a few of the bismuthinite needles are also covered in wood tin.

The association of wood tin with bismuthinite is rare for this location.

Mineral Data
What's on the rock

Bismuthinite

Formula: 
Bi2S3
Strunz: 
2.DB.05
Hardness: 
2.0 - 2.5
Streak: 
Lead-gray

Wood Tin

Variety Of: 

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Hardness: 
6.0 - 7.0
Hardness: 
0.0
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