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Calcite & Fluorite

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RMM28282

Calcite & Fluorite

Description Tabs

Description
Locality: 
Denton Mine, Harris Creek, Hardin County, Illinois, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4 × 2 cm
Largest Crystal: 
4.50cm
Description

This is a virtually flawless specimen of calcite scalenohedrons on fluorite. There is one barely noticeable, very small (1.0 mm) bruise on the edge of the largest crystal and a very tiny, barely noticeable chip on one of the terminations of the smaller crystal.

The largest crystal is a twin on the (0001) plane and the second largest is a parallel twin.

Mineral Data
What's on the rock

Calcite

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

Seller Information

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