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Crandallite

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HJZ633210

Crandallite

Rare Mineral

Description Tabs

Description
Locality: 
Serra das Éguas, Brumado, Bahia, Brazil
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.2 × 1.3 cm
Description

Crandallite on magnesite with topaz. Tan rhombs of crandallite perched on clear magnesite with an occasional small, clear topaz mixed in. 

There is a very esthetic 1-cm magnesite on the right hand side of the specimen.  Most places, crandallite occurs as crusts, matted sprays or micro crystals.  It looks like the best crystals come from Brumado.

Mineral Data
What's on the rock

Crandallite

Formula: 
CaAl3(PO4)2(OH)5·H2O
Strunz: 
8.BL.10
Crystal System: 
Trigonal
Hardness: 
5.0
Streak: 
White
Type Locality: 
Brooklyn Mine, Silver City, Tintic District, East Tintic Mts, Juab Co., Utah, USA

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