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Fluorite & Calcite

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BMM641594

Fluorite & Calcite

Description Tabs

Description
Locality: 
Weißeck Area, Murwinkel, Lungau, Salzburg, Austria
Class: 
Mixed Specimens
Size Range: 
Cabinet (10-18 cm)
Size: 
11.5 × 10 × 2.5 cm
Description

Blue semi-gloss fluorite overgrown with semi-gloss calcites. The fluorites show good transparency and amazing light zoning on the edges. The faces are lustrous with a fine texture. The color of the fluorite changes with different sources of light (Alexandrit Effect). This change in colors is relatively common with fluorites from Weisseck and can be seen as signature feature. The specimen is undamaged, except for the natural breakages on the edge of the specimen. With an edge length of up to 1.7 cm. The photos were done at daylight.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White