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Opal Var Opal-CT

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Opal Var Opal-CT

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Description Tabs

Description
Locality: 
Khorixas, Kunene Region, Namibia
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 1.1 × 0.9 cm
Description

Relatively ew find of a single pocket in 2014: very nice, sea-blue, rare cristobalite-tridymite-opal. I managed to get three smaller pieces. Not much left on the market.

As you can see in the lat pictures, the opal is partly hollow and seems to be an epimorph.

Mineral Data
What's on the rock

Opal

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

Opal-CT

Variety Of: 

Opal

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

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