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Crandallite On Fluorapatite

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GND36689

Crandallite On Fluorapatite

Description Tabs

Description
Locality: 
Moculta Phosphate Quarry, Angaston, Barossa Valley, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Cabinet (10-18 cm)
Size: 
11.5 × 6 × 4.3 cm
Description

A superb large display specimen from this notable phosphate deposit. In this specimen, cream coloured crandallite crystals occur as sprays of acicular crystals on a layer of pale blue botryoidal apatite which lines an open vugh across the entire top of the matrix.

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

Fluorapatite

Formula: 
Ca2Ca3(PO4)3F
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
5.0
Streak: 
White
Type Locality: 
Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Gondwana Minerals