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Malachite
| Chemical Formula | Cu2(CO)3(OH)2 |
| Mohs Hardness | 3.5-4.9 |
| Specific gravity | 3.9-4.0 |
| Description | Malachite is a copper carbonate hydroxide mineral. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Malachite was used as a mineral pigment in green paints from antiquity until about 1800. The pigment is moderately lightfast, very sensitive to acids, and varying in color. It is told that Cleopatra used malachite as her eye shadow. |
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