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Fluorite & Stilbite

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RBR77669

Fluorite & Stilbite

Description Tabs

Description
Locality: 
Gastein Valley, St Johann im Pongau District, Salzburg, Austria
Size Range: 
Museum (18cm plus)
Size: 
18 × 8 × 5.5 cm
Description

The specimen was mined in April 2010. The crystals are up to 14mm on edges and partly covered with a white stilbite layer. The color is light green, the piece is a fine condition. Sawn at the base.

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

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White

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