  Beryl.  
Description from the source: 
Beryl ( Be3 Al2 Si6 O18 hex.), Governador Valadares, Minas Gerais, Brazil. Not terminated cristal on Quartz with decent color. 6x4,5x4 cm (crystal up to 22 mm); 126 g. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 September, 2008 
Text Updated: 1 October, 2008 
Price: Trade 
Size: 2.4" 
Composition: Be3Al2Si6O18
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