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Anatase Brookite & Rutile

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ESM208770

Anatase Brookite & Rutile

Description Tabs

Description
Locality: 
Nalps Valley, Tujetsch, Surselva Region, Grisons, Switzerland
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 4.8 × 3 cm
Description

Grey-brown brookite plate, anatase crystals, rutile (sagenite) crystals

Mineral Data
What's on the rock

Anatase

Formula: 
TiO2
Strunz: 
4.DD.05
Hardness: 
5.5 - 6.0
Type Locality: 
St Christophe-en-Oisans, Bourg d'Oisans, Isère, Rhône-Alpes, France...

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

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal - Ditetragonal Dipyramidal
Hardness: 
6.0 - 6.5
Type Locality: 
Rutile locality, Horcajuelo de la Sierra, Madrid, Spain