Diopside vs. Dioptase — What's the Difference?

Diopside is a monoclinic pyroxene mineral with composition MgCaSi2O6. It forms complete solid solution series with hedenbergite (FeCaSi2O6) and augite, and partial solid solutions with orthopyroxene and pigeonite.

Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent.

A light green, monoclinic pyroxene mineral, CaMgSi2O6, used as a gemstone and refractory.

An intense emerald-green to bluish-green copper cyclosilicate mineral.

(mineral) A monoclinic pyroxene mineral, a magnesium calcium silicate with the chemical formula CaMgSi₂O₆, found in igneous and metamorphic rocks.

A hydrous silicate of copper, occurring in emerald-green crystals.

A crystallized variety of pyroxene, of a clear, grayish green color; mussite.