Malachite  | ‪#‎Geology‬‬‬‬

Formula: Cu2(CO3)(OH)2
Colour:Bright green, with ...
Hardness:3½ - 4
Streak:Light green
Malachite is a green, very common secondary copper mineral with a widely variable habit. Typically it is found as crystalline aggregates or crusts, often banded in appearence, like agates. It is also often found as botryoidal clusters of radiating crystals, and as mammillary aggregates as well.

Malachite stalactites

Locality: L'Etoile du Congo Mine (Star of the Congo Mine; Kalukuluku Mine), Lubumbashi (Elizabethville), Southern area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Size: small cabinet, 6.8 x 6.0 x 4.7 cm

One of my favorites of the lot! This elegant specimen has 5 gently waving stalks rising up form a carpet of velvety malachite covering botryoidal malachite matrix. It is very attractive and 3-dimensional, surreal in the separation of the stalks despite their closeness upon matrix. All stalks are complete all around. The ew that were not have been clipped off at the matrix contact, and actually it is quite interesting and appealing to see the concentric ringed circles of their bases, in contrast to the smooth surface otherwise.

Copyright © Rob Lavinsky