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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. | License: | http://www.imagine.org.uk/about/copyright/ | Rights holder: | Tyne & Wear Museums | Subjects: | beyond the North East rocks and minerals natural world | Source: | Tyne and Wear Imagine | Identifier: | http://www.imagine.org.uk/details/index.... | Go to resource |
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