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Bertrandite

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SER200328

Bertrandite

Description Tabs

Description
Locality: 
Golconda Pegmatite, Governador Valadares, Minas Gerais, Brazil
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.7 × 2 cm
Description

A very rich specimen featuring hundreds colourless bertrandite crystals on albite and muscovite

Mineral Data
What's on the rock

Bertrandite

Formula: 
Be4(Si2O7)(OH)2
Strunz: 
9.BD.05
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 7.0
Type Locality: 
Petit-Port, Nantes, Loire-Atlantique, Pays de Loire, France