  Erythrite.  
Description from the source: 
Erythrite (Co3 (AsO4)2x8 H2 O mon.), Dome Rock, South Australia, Australia. With pseudocubic Smolianinovite. 3x2,2x1,5 cm; 7 g. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 October, 2008 
Text Updated: 13 March, 2009 
Price: Trade 
Size: 0.75" 
Composition: Co3(AsO4)2.8H2 O
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