  Londonite-Rhodizite.  
Description from the source: 
Londonite-Rhodizite serie ( (Cs K Rb) Al4 Be4 (B Be)12 028 to Rb=0 for the pure Rhodizite cub.), Antandrokomby, Antsirabe`, Madagascar. Perfect isolated crystals. 1x0,8x0,7 cm the bigger; 2 g all. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 28 January, 2009 
Text Updated: 29 January, 2009 
Price: Trade 
Size: 0.4" 
Composition: (CsKRb)Al4Be4(BBe)12028
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