an uncommon, typically emerald to light-green but sometimes white, auburn, buff, or violet mineral, NaAlSi2O6, used as a gem as well as for ornamental carvings. It's the tougher plus highly appreciated as a type of jade.
A pyroxene mineral, a sodium aluminum silicate because of the chemical formula Na(Al,Fe3+)Si2O6, within metamorphic rocks.
See jade, the rock.
a hard green mineral comprising sodium aluminum silicate in monoclinic crystalline form; a supply of jade; found principally in Burma