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Description: | Quartz is a very common mineral. When it is pure, it is colourless. It is often coloured by impurities, for example, amethyst (the semi-precious purple variety), is coloured by traces of iron. Quartz is a major constituent of a number of rock types, including granite and sandstone. This mineral is used as a raw material for glass making, as an abrasive material, and in quartz watches. This quartz crystal was collected at Chamounix, Switzerland, by Edward Backhouse in 1829. | License: | http://www.imagine.org.uk/about/copyright/ | Rights holder: | Tyne & Wear Museums | Subjects: | 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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