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Opal Var Forcherite

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CLB178156

Opal Var Forcherite

ex collection Dietmar Möhler, Graz
Classic Locality

Description Tabs

Description
Locality: 
Holzbrücken Mill, Ingering valley, Styria, Austria
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 5.2 × 2.5 cm
Description

First time I've ever seen this orange-yellow, opaque opal variety. Very good, rare sample. Very hard to get.
The yellow color is caused by microscopic inclusions of orpiment and realgar.
The specimen comes with the original label rom 1969.

Mineral Data
What's on the rock

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

Forcherite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Hardness: 
0.0

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