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Description: | Opal is a very popular gemstone. Black opal, which has a very dark background colour, is the most sought-after variety. 85% of the worlds opal comes from Australia. Another important source is in Mexico, where fire opal, which has a yellow to red colour, is mined.
Associated Geology: Limonite | Source: | Tyne & Wear Archives & Museums | Identifier: | emu.ecatalogue.earthsciences.114479 | Go to resource |
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