  Danburite.
Description from the source:
Danburite (Ca B2 (SiO4)2 orth.), Charcas, San Luis Potosi`, Mexico. Prismatic, geminated, partially translucent, good. 6,5x2x1,5 cm; 25 g.
Source: Simone Citon
Contributor: John Gray
Acquired: 28 January, 2009
Text Updated: 29 January, 2009
Price: Trade
Size: 2.6"
Composition: CaB2(SiO4)2
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