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Sphalerite Quartz & Fluorite

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CFL699933

Sphalerite Quartz & Fluorite

Fluorescent

Description Tabs

Description
Locality: 
Illinois-Kentucky Fluorospar District, Illinois, United States of America
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
14.5 × 9 × 4 cm
Weight: 
555.00gr
Description

Classic specimen of dark brown sphalerite associated with quartz and pale purple fluorite.  Some of the quartz crystals are bi-terminated and the fluorite is fluorescent.  Notice also the reaction of the second generation of quartz crystals under LW UV light.

Mineral Data
What's on the rock

Sphalerite

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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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