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Quartz Psm Fluorite With Hyalite

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GND46312

Quartz Psm Fluorite With Hyalite

Pseudomorph

Description Tabs

Description
Locality: 
Mount Gee, Arkaroola Region, Flinders Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 4.2 × 4 cm
Description

A single 1.5cm octahedral fluorite crystal has been covered or replaced by quartz on top of this 'cactus' type form. There is some minor hyalite on the surface of the quartz which fluoresces a bright yellow under L.W UV light. The radial structure of the quartz is best seen in the base of the specimen.

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

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white
Gondwana Minerals