ammolite

noun

am·​mo·​lite ˈa-mə-ˌlīt 

plural ammolites

: a semi-precious gemstone consisting of fossilized ammonite shells

The winner will be sent an ammolite trophy, the official gemstone of the Alberta.

—Eric Volmers, Calgary Herald (Alberta, Canada), 21 Nov. 2009

Word History

Etymology

probably blend of ammonite entry 1 and -lite

First Known Use

1982, in the meaning defined above

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