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Anatase On Quartz

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PDM618030

Anatase On Quartz

Gem Crystal

Description Tabs

Description
Locality: 
Disentis, Vorderrhein, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
12.3 × 6.6 × 3.4 cm
Largest Crystal: 
0.50cm
Description

Bicoloured brown blue crystals of anatase with very good transparency and lustre, on a matrix of quartz crystals that surpass 80 mm and are included by lustrous black tabular hematite crystals.

Collected by Paul Van Wassenhoven (BE) in one of the collecting trips carried out between 1988-95. Ex. Paul Van Wassenhoven specimen.

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...

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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