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Opal

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SHS99731

Opal

Description Tabs

Description
Locality: 
Fekete Hill, Bózsva, Zemplén Moutains, Borsod-Abaúj-Zemplén County, Hungary
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 5.5 × 3.7 cm
Description

Brown piece of opal

Mineral Data
What's on the rock

Opal

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