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amazonite

[am-uh-zuh-nahyt] /ˈæm ə zəˌnaɪt/
noun, Mineralogy
1.
a green feldspar, a variety of microcline, used as an ornamental material.
Also called Amazon stone.
Origin
1595-1605
1595-1605; Amazon (river) + -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for amazon-stone

amazonite

/ˈæməzəˌnaɪt/
noun
1.
a green variety of microcline used as a gemstone. Formula: KAlSi3O8 Also called Amazon stone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for amazon-stone

amazonite

a gemstone variety of green microcline (q.v.), a feldspar mineral. Frequently confused with jade, amazonstone varies in colour from yellow-green to blue-green and may also exhibit fine white streaks; it is usually opaque and therefore is cut en cabochon (with a rounded and convex polished surface). Although its name is derived from the Amazon River, no deposits have been found there. Amazonstone has been mined in Minas Gerais, Brazil; Ontario and Quebec, Canada; Baveno, Italy; and the Ural Mountains of Russia. The Pikes Peak district of Colorado, U.S., became the most important source of amazonstone after 1876; when samples were unveiled at the Centennial Exhibition, their impressive purity and size eventually forced competing Russian mineral dealers out of business.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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