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Barrerite

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LAM958682

Barrerite

Classic Locality

Description Tabs

Description
Locality: 
Kupreanof Island, Wrangell-Petersburg, Alaska, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.5 × 0.5 cm
Description

Bladed white crystals of barrerite sitting on a quartz matrix

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...

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