Malachite stalactites - DR Congo

Small forest of malachite stalactites (old collection) from DR Congo.

Stone dimensions: L: 80mm x W: 37mm x H: 150mm.

Weight with base: 748g.

Malachite's chemical formula is Cu₂(CO₃)(OH)₂. It is composed mainly of copper carbonate.

Malachite's hardness is between 3.5 and 4 on the Mohs scale, making it a relatively soft mineral.

Malachite's density ranges from 3.6 to 4 g/cm³. This means that malachite is relatively heavy compared with other minerals of similar size.

Color and possible variations: Malachite is generally intense green in color, with concentric bands or spiral patterns in different shades of green.