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Description: | Topaz is a relatively hard mineral, and a popular gemstone. Yellow and orange stones are fairly common, but the sought after pink topaz is often produced by heat treating yellow stones. Fine crystals of topaz are not uncommon, they are usually long and striated. Topaz is often found in granitic rocks, important sources include Brazil and the Ural Mountains. Closer to home, it occurs in Cornwall and the Mourne Mountains of Northern Ireland. | 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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