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Fluorite On Dolomite

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BMM966370

Fluorite On Dolomite

Description Tabs

Description
Locality: 
Frohnau, Annaberg-Buchholz, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 5.2 × 3.4 cm
Description

Individual exposed fluorite cubes on dolomite as perimorphose after calcite (pseudomorphose). The fluorites show a light yellow to golden center with multiple thin blue zonings along the edges. The dolomite perimorphose is unique from the mining area at Frohnau (Erzgebirge, Saxony, Germany). It should mention that the piece comes from a unique fluorite find of this locality (alter Bäuerin Schacht, Bierschnabelsohle, Bäuerin Stehender): No fluorite was found there before. Undamaged! The wonderful piece should be highly ranked because of its rarity!

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

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White