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Quartz Psm Fluorite

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MMM42131

Quartz Psm Fluorite

Description Tabs

Description
Locality: 
Wheal Mary Ann, Menheniot, Cornwall, United Kingdom
Size Range: 
Cabinet (10-18 cm)
Size: 
7 × 10 × 2.5 cm
Largest Crystal: 
1.50cm
Description

A plate of fluorite crystals to 1.5 cm completely altered to quartz with a partial coating of thin chalcedony.

Mineral Data
What's on the rock

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