chrysoprase
noun
chrys·o·prase ˈkri-sə-ˌprāz 
: an apple-green chalcedony valued as a gem
Example Sentences
Recent Examples on the Web Lampley herself has a collection of lockets, including a Sherman Field reversible chrysoprase stone and gold model. 
Jill Newman, Town & Country, 19 Aug. 2022 Three of the dials are decorated with hardstones carved by Steenman in the shape of roses – including imperial jasper, coral, chrysoprase, mokaïte and mother-of-pearl. Carol Besler, Forbes, 21 May 2021
Jill Newman, Town & Country, 19 Aug. 2022 Three of the dials are decorated with hardstones carved by Steenman in the shape of roses – including imperial jasper, coral, chrysoprase, mokaïte and mother-of-pearl. Carol Besler, Forbes, 21 May 2021 Word History
Etymology
Middle English crisopace, crisopassus, crissoprassus, borrowed from Latin chrȳsoprasos, chrȳsoprasum, borrowed from Greek chrȳsóprasson, from chrȳso- chryso- + -prasos, derivative of práson "leek," probably of pre-Greek substratal origin
Note: Both Greek práson and Latin porrum "leek" can be taken back to a zero-grade *pr̥so-, but given the limited distribution of the etymon a loan from a Mediterranean language is more likely than Indo-European descent.
First Known Use
15th century, in the meaning defined above