Malachite

Cu₂(CO₃)(OH)₂

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A vivid green copper carbonate (Cu2(CO3)(OH)2), malachite has been used as a pigment and gemstone for thousands of years. It crystallizes in the monoclinic system, most commonly as botryoidal, stalactitic, or banded massive aggregates whose concentric green bands make it a favorite for decorative objects. The mineral is translucent with a vitreous luster, a light-green streak, and perfect {201} cleavage; its Mohs hardness is 3.5 to 4 and its specific gravity 3.60 to 4.00. Malachite forms in the oxidized zones of copper deposits, frequently alongside azurite. A light-green streak and perfect cleavage help confirm the mineral where weathering has dulled its surface.

Malachite is a vivid green copper carbonate mineral that has been used as a pigment and gemstone for thousands of years. Its distinctive banded pattern makes it popular in decorative objects. It commonly forms with azurite in copper deposits.

Système Cristallin	Monoclinic
Classe Minérale	05 Carbonates and Nitrates
Dureté Mohs	3.5-4.0
Densité	3.60-4.00
Couleur	Bright green, dark green
Éclat	Vitreous
Trait	Light green
Clivage	Perfect {201}
Cassure	Subconchoidal to uneven
Transparence	Translucent
Habitus Cristallin	Botryoidal, stalactitic, banded massive