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Smoky quartz or Smokey quartz, also known as Cairngorm or Cairngormstone is a brown to black variety of quartz caused through the natural (or artificial) irradiation of aluminium-containing rock crystal. A very dark brown to black opaque variety is known as morion.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Smoky_quartz". A list of authors is available in Wikipedia.|