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Londonite

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SER134955

Londonite

Type Locality

Description Tabs

Description
Locality: 
Antsongombato, Antsentsindrano, Anosiarivo Manapa, Betafo, Vakinankaratra, Madagascar
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 2.5 × 3 cm
Largest Crystal: 
1.70cm
Description

a yellow crystal on matrix from the type locality

Mineral Data
What's on the rock

Londonite

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