Main Entry: aven·tu·rine

Pronunciation: \ə-ˈven-chə-ˌrēn, -rən\

Function: noun

Etymology: French, from aventure chance — more at adventure

Date: 1811

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