Opal doublets
Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)
Picture No
10711144
Media ID
47585399
Size
4404px x 4292px
(7.2MB)
Credit
Mary Evans / Natural History Museum
Source
Photograph from the Natural History Museum Collection
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Doublet Fluorescence Fluorescent Fluorescing Gemstone Mineral Mineraloid Opal Opalescence Polished Sparkle Ultra Violet
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