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Brookite On Rock Crystal

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WND806615

Brookite On Rock Crystal

Classic Locality

Description Tabs

Description
Locality: 
Vals Valley, Surselva Region, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.4 × 4.5 × 5.1 cm
Description

This is a superfine and ultrarare alpine specimen. One of the most sought after alpine species brookite a huge tabular crystals perched on small rockcrystals. The brookite is highly lustrous and clear striated. This great specimen is not perfect, but it is extremely hard to get hold of such a good piece which comes with a fine old label.

Mineral Data
What's on the rock

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

Rock Crystal

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
Hardness: 
0.0
Wendel Minerals

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