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Barrerite

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MEX544596

Barrerite

Rare Mineral

Description Tabs

Description
Locality: 
Alaska, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.8 × 6.4 × 3.8 cm
Weight: 
99.00gr
Description

Very nice specimen with well terminated barrerite crystals.

Mineral Data
What's on the rock

Barrerite

Formula: 
(Na,K,Ca0.5)2[Al2Si7O18]·7H2O
Strunz: 
9.GE.15
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 4.0
Streak: 
White
Type Locality: 
Sant' Efisio Tower, Nora, Pula, Cagliari Province, Sardinia, Italy...