chrysoprase

chrysoprase

[kris-uh-preyz]
noun Mineralogy.
a green variety of chalcedony, sometimes used as a gem.

Origin:
1250–1300; Middle English < Latin chrȳsoprasus < Greek chrȳsóprasos, equivalent to chrȳso- chryso- + prás(on) leek + -os noun suffix

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Chrysoprase
Collins
World English Dictionary
chrysoprase (ˈkrɪsəˌpreɪz)
 
n
an apple-green variety of chalcedony: a gemstone
 
[C13 crisopace, from Old French, from Latin chrӯsoprasus, from Greek khrusoprasos, from chryso- + prason leek]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Encyclopedia Britannica
Encyclopedia

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.

Learn more about chrysoprase with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature