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chlorospinel

American  
[klawr-oh-spi-nel, -spin-l, klohr-] / ˌklɔr oʊ spɪˈnɛl, -ˈspɪn l, ˌkloʊr- /

noun

Mineralogy.
  1. a variety of spinel used as a gem, colored grass-green by the presence of copper.


Etymology

Origin of chlorospinel

First recorded in 1840–50; chloro- 1 + spinel