Opal
Play of colour in opal (opalescence). Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)
Picture No
10703711
Media ID
47586227
Size
4733px x 3730px
(7.4MB)
Credit
Mary Evans / Natural History Museum
Source
Photograph from the Natural History Museum Collection
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Colouration Glassy Hydrated Mineraloid Opal Opalescence Silica
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