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Opal

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MMM85178

Opal

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Description
Locality: 
Goonvean China Clay Pit, Treviscoe, St Austell, Cornwall, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.2 × 3.3 × 2 cm
Description

A small but nice specimen of caramel opal which plays different colours when caught in the right light.

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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