Opal
A cut stone and crystal of opal. Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)
Picture No
10710400
Media ID
47583975
Size
3883px x 4789px
(9.8MB)
Credit
Mary Evans / Natural History Museum
Source
Photograph from the Natural History Museum Collection
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Gemstone Hydrated Mineraloid Opal Opalescence Polished Silica Teardrop
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