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Sphalerite & Fluorite

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CFL946212

Sphalerite & Fluorite

Description Tabs

Description
Locality: 
Denton Mine, Harris Creek, Hardin County, Illinois, United States of America
Class: 
Crystals on Matrix
Size Range: 
Museum (18cm plus)
Size: 
23 × 20 × 5 cm
Description

Superb specimen of highly lustrous dark amber sphalerite crystals, up to 1 cm in size, associated with several isolated translucent purple fluorite crystals and overgrown on fluorite matrix.  Notice the line of crystallized fluorite along the edge of the sphalerite (left side of the specimen).  Much better in person.  Purchased in 1992.

Mineral Data
What's on the rock

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

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

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