  Dolomite.  
Description from the source: 
Dolomite (Ca Mg (CO3)2 trig.), Ramsbeck, Germany. Rombohedral crystal aggregates. 3x2,5x1 cm; 11 g with box. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 10 January, 2009 
Text Updated: 10 January, 2009 
Price: Trade 
Size: 1.2" 
Composition: CaMg(CO3)2
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