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Bertrandite & Phenakite

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SER938128

Bertrandite & Phenakite

Description Tabs

Description
Locality: 
Gigante Pegmatite, Punilla Department, Córdoba, Argentina
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.5 × 2.5 cm
Description

several colourless crystals of bertrandite with numerous phenakite elongated crystals

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

Phenakite

Formula: 
Be2SiO4
Strunz: 
9.AA.05
Hardness: 
7.5 - 8.0
Type Locality: 
Izumrudnye Kopi area, Malyshevo, Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...