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[kris-uh-preyz] /ˈkrɪs əˌpreɪz/
noun, Mineralogy
a green variety of chalcedony, sometimes used as a gem.
1250-1300; Middle English < Latin chrȳsoprasus < Greek chrȳsóprasos, equivalent to chrȳso- chryso- + prás(on) leek + -os noun suffix Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for chrysoprase


an apple-green variety of chalcedony: a gemstone
Word Origin
C13 crisopace, from Old French, from Latin chrӯsoprasus, from Greek khrusoprasos, from chryso- + prason leek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for chrysoprase

brittle, translucent, semiprecious chalcedony (q.v.), a variety of the silica mineral quartz. It owes its bright apple-green colour to colloidally dispersed hydrated nickel silicate; heating or prolonged exposure to sunlight will cause the colour to fade. Its physical properties are those of quartz (see silica mineral [table] ). Typical occurrences are in serpentine as a secondary mineral found in cavities and veins; California and Silesia have notable deposits. Imitation chrysoprase is chalcedony dyed with nickel or chromium salts.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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