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Cassiterite

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Cassiterite

Description Tabs

Description
Locality: 
Wheal Pendarves, Troon, Cornwall, United Kingdom
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 8 × 5 cm
Description

Granitic matrix with one side covered with quartz points and needles of tourmaline. Amongst this are numerous groups of dark-brown to black cassiterite crystals.

Mineral Data
What's on the rock

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0
Surrey Minerals