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A rare, usually emerald to light green but sometimes white, auburn, buff, or violet mineral, NaAlSi2O6, used as a gem and for ornamental carvings. It is the tougher and more highly valued form of jade.
(Minerals) a usually green or white mineral of the clinopyroxene group, found in igneous and metamorphic rocks. It is used as a gemstone (jade). Composition: sodium aluminium silicate. Formula: NaAlSi2O6. Crystal structure: monoclinic
the most precious type of jade; a colorless, green, or black pyroxene, sodium aluminum silicate, NaAlSi2O6.