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Londonite & Elbaite

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VCV163917

Londonite & Elbaite

Description Tabs

Description
Locality: 
Tetezantsio, Andrembesoa, Betafo, Vakinankaratra, Madagascar
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.9 × 3.2 × 3.1 cm
Description

Numerous sharp glossy crystals of londonite scattered around a matrix of quartz and bright cranberry pink elbaite var rubellite crystal sections.

Londonite is an ususual borate mineral and the cesium-dominant analogue of rhodizite.

Great specimen.

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

Elbaite

Formula: 
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.5
Streak: 
White
Type Locality: 
Fonte del Prete, San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy...
Vic's Vugh Minerals