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Andradite & Shortite & Biotite

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CFL820851

Andradite & Shortite & Biotite

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 1.5 cm
Description

Uncommon specimen of andradite crystals associated with shortite and biotite in fluorescent calcite matrix.  Collected by Gilles Haineault in 1990.  Difficult to photograph the well formed andradite crystals.

Mineral Data
What's on the rock

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Drammen, Buskerud, Norway

Shortite

Formula: 
Na2Ca2(CO3)3
Strunz: 
5.AC.25
Hardness: 
3.0
Type Locality: 
John Hay Jr. Well No. 1, Green River Formation, Sweetwater Co., Wyoming, USA

Biotite

Group Parent: 
Mica Group

Seller Information

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