aventurine

 
Pronunciation: /əˈvɛntʃərɪn/

noun

[mass noun]
  • 1brownish glass containing sparkling particles of copper or gold: [as modifier]: aventurine glass
  • 2a translucent mineral containing small reflective particles, especially quartz containing mica or iron compounds, or feldspar containing haematite.

Origin:

early 18th century: from French, from Italian avventurino, from avventura 'chance' (because of its accidental discovery)