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Precious Opal

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GMN810389

Precious Opal

Description Tabs

Description
Locality: 
Monok, Zemplén Mountains, Borsod-Abaúj-Zemplén County, Hungary
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 1.7 × 1 cm
Description

Superb opal in rhyolite sphere with intensive opalescence in green, red, and some blue. Rarity from an unusual locality.

Mineral Data
What's on the rock

Precious Opal

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

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