schorl

A Dictionary of Earth Sciences | 1999 | 156 words | Copyright

schorl A black, opaque variety of tourmaline which may occur as radiating, needle-like crystals, as seen, for example, in the granites of Cornwall, Britain.

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AILSA ALLABY and MICHAEL ALLABY. "schorl." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "schorl." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-schorl.html

AILSA ALLABY and MICHAEL ALLABY. "schorl." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-schorl.html

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