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Thorbastnäsite Donnayite & Brookite

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SYM891081

Thorbastnäsite Donnayite & Brookite

Rare Mineral

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 1.8 × 1.2 cm
Description

White thorbastnäsite crystals with black brookite and yellow donnayite group on the matrix. 

Mineral Data
What's on the rock

Thorbastnäsite

Formula: 
Th(Ca,Ce)(CO3)2F2·3H2O
Strunz: 
5.BD.20a
Hardness: 
4.0 - 4.5
Colour: 
Brown
Type Locality: 
Pichikhol' alkaline Massif, Balygtyg-Khem River, Sangilen Upland, Tuva Republic, Eastern-Siberian Region, Russia...

Brookite

Formula: 
TiO2
Strunz: 
4.DD.10
Crystal System: 
Orthorhombic
Hardness: 
5.5 - 6.0
Type Locality: 
Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd (Caernarvonshire), Wales, UK