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Londonite

Type Locality
Antandrokomby pegmatite, Manandona Valley, Sahatany Pegmatite Field (Mt Ibity area), Vakinankaratra Region, Antananarivo Province, Madagascar
Mineral Data
(Cs,K,Rb)Al4Be4(B,Be)12O28
Strunz: 
6.GC.05
Physical Properties
Crystal System: 
Isometric
Streak: 
White
Hardness: 
8.0
Synonyms
Synonyms: 
Rhodizite - Rb
Photos