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Dawsonite

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GFM1022836

Dawsonite

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Description Tabs

Description
Locality: 
Kerimasi Volcano, Monduli District, Arusha Region, Tanzania (United Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 3 cm
Description

White 5 mm fibrous crystal aggregates on cavities in light brown Carbonate Lava, very unusual genesis and paragenesis. Interesting samples from a rare location.

Mineral Data
What's on the rock

Dawsonite

Formula: 
NaAlCO3(OH)2
Strunz: 
5.BB.10
Crystal System: 
Orthorhombic
Hardness: 
3.0
Streak: 
White
Type Locality: 
McGill University campus, Montréal, Québec, Canada