BIOTITE MICA - CORNWALL
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Lustrous sheaves of biotite mica
This quarry in Cornwall was well known for the biotite mica that occurred in the coarsely-crystalline pegmatite.
Lustrous sheaves of biotite mica
Trelavour Downs, St. Dennis,
Near St. Austell, CornwallThis quarry in Cornwall was well known for the biotite mica that occurred in the coarsely-crystalline pegmatite.
The quarry has now been infilled.
Size: approx. 8 x 6 x 3 centimetres
Weight: 180 grams
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