Aventurine
Pronunciation : A*ven"tu*rine
Part of Speech : n.
Etymology : [F. aventurine: cf. It. avventurino.]
Definition : 1. A kind of glass, containing gold-colored spangles. It was produced in the first place by the accidental (par aventure) dropping of some brass filings into a pot of melted glass.
2. (Min.)
Defn: A variety of translucent quartz, spangled throughout with scales of yellow mica. ~= feldspar, a variety of oligoclase with internal firelike reflections due to the presence of minute crystals, probably of hematite; sunstone.
Source : Webster's Unabridged Dictionary, 1913