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Fluorite Anatase Brookite & Rutile

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SCH96790

Fluorite Anatase Brookite & Rutile

Description Tabs

Description
Locality: 
Bächli Valley, Grimsel, Hasli Valley, Bern, Switzerland
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.3 × 2.4 cm
Description

Beautiful specimen with an undamaged fluorite set on an adularia matrix.The fluorite has a pink core being the outer edges of a light purple color, much more visible under the sunlight. The crystal form is quite interesting as is octahedral with cube and dodecahedral modifications. Some faces are frosted.The specimen is dusted with dozens of small black bright anatase and at the back there a couple of groups of brookite with some dispersed rutile.An elegant fluorite!

 

Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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
schani

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