Morion
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This article is about the mineral variety, for the English term for the helmet worn in the 16th century see Plate armour.
Morion or morion quartz is a dark-brown to black opaque variety of smoky quartz resulting from the natural or artificial irradiation of aluminium-containing milk quartz.
See also: List of minerals
External link
Mineral Galleries - smoky quartz (http://mineral.galleries.com/minerals/gemstone/smoky_qu/smoky_qu.htm)