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Opal

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MGR622587

Opal

Description Tabs

Description
Locality: 
Coober Pedy, Central North, South Australia, Australia
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 3 × 1.6 cm
Description

This is opal after fossil mussel. The specimen is complete all around. As you can see on the third photo in the gallery, which shows the specimen rotated to the side, there is still the complete habit of the shell. The opal shows iridiscent fire, with steps of green, red and blue.

Mineral Data
What's on the rock

Opal

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