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Precious Opal

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SYA876959

Description Tabs

Description
Locality: 
Mintabie, North West Province, South Australia, Australia
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.5 × 1.2 cm
Description

A blue precious opale nodule with internal reflexes without matrix.

Old-time specimen from Dr. M. Seitz collection.

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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