noun.
A silicate of magnesium and iron, commonly of a yellow or green color, and varying from transparent to translucent.
noun.
Goldstone. See aventurin, 1.
the GNU version of the Collaborative International Dictionary of English
noun.
A mineral, composed of silica, magnesia, and iron, of a yellow to green color. It is common in certain volcanic rocks; -- called also olivine and peridot. Sometimes used as a gem. The name was also early used for yellow varieties of tourmaline and topaz.