System: Orthorhombic
Colour: Green, bluish green, ...
Lustre: Vitreous, Waxy, Earthy
Hardness: 2½ - 3½
A mineral of secondary origin, commonly associated with other secondary copper minerals, it is typically found as glassy botryoidal or rounded masses or bubbly crusts, and as jackstraw mats of tiny acicular crystals or tufts of fibrous crystals. Copper-bearing allophane can look similar.

 Malachite, Chrysocolla
Locality: Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Size: 19.4 x 12.6 x 4.8 cm

There was fierce bidding for the last one of these we had, and you can see why. This one is at least as spectacular! It is an eye-catching specimen of malachite and chrysocolla that have formed together to create gorgeous circles of deep turquoise-colored chrysocolla in a field of deep green malachite - the reverse of the other one we had, which had green malachite circles amidst the blue chrysocolla. Polished to bring out the beauty better. This is a BIG specimen, super-showy! Some of the layers are chipped away in one area on an edge, which you could see as a detraction, but to me, it is fascinating to see how the layers formed, and to note the gem-quality of the chrysocolla here (which is sometimes used in jewelry).

Copyright © Rob Lavinsky

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