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Fluorite Adularia & Chlorite

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MGR535339

Fluorite Adularia & Chlorite

Description Tabs

Description
Locality: 
Akchatau Mine, Karaganda Oblast, Kazakhstan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.9 × 3.4 cm
Description

The octahedral crystal are up to 11mm on edges. Their habit is a combination of octahedron and rhombendodekaeder. The edges and faces are sharp terminated. They show a glassy character and all faces are highly lsutrous. The color reminds to amethyste. The group is framed with dark green, nearly black chlorite. Finally there is a fine contrast to white, partly crystalized barite. Although there are small nicks, this is a remarkable specimen. The clarity, the color, the sharp habit is exceptional for the locality!

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

Adularia

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic
Hardness: 
6 Ortho - clase

Chlorite

Synonym Of: 

Chlorite Group

Group Parent: 
Chlorite
Crystal System: 
Monoclinic
Hardness: 
2 - 2.5
Colour: 
Green, Grey, Brown
Streak: 
colourless
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