Malachite stalactite 9.37 gr.

Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. 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. Pseudomorphs after more tabular or blocky azurite crystals also occur.( from Wikipedia)

The hardness is 3.5-4 .This slab has been cut from a stalactite and is polished on both side. It comes from Congo and also been cut and polished there.

Size:30x30x4 mm.

Weight:9.37 grams

CODE#5327