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Opal

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CLB176459

Opal

Classic Locality

Description Tabs

Description
Locality: 
Boi Morto Mine, Pedro II, Piauí, Brazil
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.6 × 5.8 × 3.9 cm
Description

Thick green and blue opal in matrix.
Brazilian opal has become scarce.

Mineral Data
What's on the rock

Opal

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

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