- a green mineral, basic copper carbonate, Cu2CO3(OH)2, an ore of copper, used for making ornamental articles.
- a ceramic ware made in imitation of this.
- a bright green mineral, found in veins and in association with copper deposits. It is a source of copper and is used as an ornamental stone. Composition: hydrated copper carbonate. Formula: Cu 2 CO 3 (OH) 2 . Crystal structure: monoclinic
n.common green ore of copper, late 14c., from French, ultimately from Greek malachitis (lithos) “mallow (stone),” from malakhe “mallow” (see mallow (n.)); the mineral traditionally so called from resemblance of its color to that of the leaves of the mallow plant.
- A bright-green monoclinic mineral occurring as a mass of crystals (an aggregate) with smooth or botryoidal (grape-shaped) surfaces. It is often concentrically banded in different shades of green. Malachite often occurs together with the mineral azurite in copper deposits. Chemical formula: Cu2CO3(OH)2.