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Elbaite Var Tsilaisite

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CSL152302

Elbaite Var Tsilaisite

Gem Crystal

Description Tabs

Description
Locality: 
Tsilaizina, Sahanivotry Manandona, Antsirabe II, Vakinankaratra, Madagascar
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 1.8 × 2.1 cm
Description

This is a perfect, terminated crystal of manganese bearing elbaite variety "tsilaisite". The crystal is sitting on feldspar/pegmatite matrix. It has been named after the Tsilaizna pegmatite, but finally this material wasn't approved as a new mineral species due it's lower manganese content. Magnanese dominant member finally was approved as new mineral and named as tsilaisite from Grotta d'Oggi, Elba, Italy.

Mineral Data
What's on the rock

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...

Tsilaisite

Variety Of: 

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Hardness: 
7
Loranth Minerals

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