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Hyalite On Quartz

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GND29699

Hyalite On Quartz

Description Tabs

Description
Locality: 
Mount Gee, Arkaroola Region, Flinders Ranges, South Australia, Australia
Size Range: 
Cabinet (10-18 cm)
Size: 
11.3 × 7.2 × 3.8 cm
Description

A superb plate of grey looking quartz crystals with a swathe of orange coloured hyalite sitting on top. The orange colour is due to iron stained clay particles in or under the hyalite,

Highly unusual and a great display specimen. No damage.

Mineral Data
What's on the rock

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

Quartz

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