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Anatase On Quartz

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BMM620449

Anatase On Quartz

Description Tabs

Description
Locality: 
Binn Valley, Valais, Switzerland
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 3.5 × 2.5 cm
Description

Dark gray to black anatase with high-gloss surfaces. The surfaces show the finely striped structure which is typical of anatase. The crystal is doubly terminated and 4 mm long. The anatase is grown on water-clear quartz-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...

Quartz

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