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Londonite

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Watches:
MGR880664

Londonite

Description Tabs

Description
Locality: 
Antsongombato, Antsentsindrano, Anosiarivo Manapa, Betafo, Vakinankaratra, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.8 × 3.1 × 4 cm
Description

Here we have a fine matrix specimen of this rare mineral from Madagascar. The crystal on matrix is sharp terminated and shows an intense yellow colour.

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