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Opal

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MGR974295

Opal

Classic Locality

Description Tabs

Description
Locality: 
Dubník, Červenica, Prešov County, Prešov Region, Slovakia (Slovak Republic)
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 3.4 × 2.4 cm
Description

Quite large example of Slovakian crystal opal. This raw specimen shows supr gemmy areas intergrown in matrix with a great colour variation. There is a very dominant purple present and also a lot of blue. Additionally there is also some orange and yellow present.

Mineral Data
What's on the rock

Opal

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