Dictionary

aventurine

noun aven·tu·rine \ə-ˈven-chə-ˌrēn, -rən\

Definition of AVENTURINE

1
:  glass containing opaque sparkling particles of foreign material (as copper or chromic oxide)
2
:  a translucent quartz spangled throughout with scales of mica or other mineral

Origin of AVENTURINE

French, from aventure chance — more at adventure
First Known Use: 1811

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