  Apatite.
Description from the source:
Apatite (Ca5 (PO4)3 F hex.), Otter Lake, Quebec, Canada. Isolated well formed crystal with high lustre. 4,5x2,5x1,5 cm; 35 g.
Source: Simone Citon
Contributor: John Gray
Acquired: 30 September, 2008
Text Updated: 1 October, 2008
Price: Trade
Size: 1.75"
Composition: Ca5(PO4)3F
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