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). 19.4 x 12.6 x 4.8 cm