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Londonite

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ADMN15404

Londonite

Description Tabs

Description
Locality: 
Ambalabe, Manapa, Anosiarivo Manapa, Betafo, Vakinankaratra, Madagascar
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.5 × 5.3 × 2.6 cm
Largest Crystal: 
0.70cm
Description

A feldspar matrix is covered with dispersed bladed crystals of a deep black currant coloured elbaite, with two lustrous crystals of londonite to 7mm across.

Aesthetic combination and display, no damage.

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

Seller Information

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