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Fluorite Calcite Pyrite & Galena

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RBR600903

Fluorite Calcite Pyrite & Galena

Description Tabs

Description
Locality: 
Victory Mine, Cave-in-Rock, Hardin County, Illinois, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Museum (18cm plus)
Size: 
20 × 16 × 11.5 cm
Description

First of all: the specimen is an undamaged floater. It consists mainly of a bis crystal with a max. lenght of 14 cm (!), so it's really impressive. This crytsal shows a light yellow color as first generation. The second generation is mainly visible at the edged of the crystals and consists of a light violet layer. The items structure is excellent, many subindividuals can be seen - all razorsharp. To complete the paragenesis you can find some white calcite as well as galena and some pyrite. This type of specimen is classic for Hardin co. It is very easy to display in variouse positions and a real eyecatcher. The backside is also completly crystallized. No damages, once again.

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

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

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