This is a polished piece of Malachite and Chrysocolla. Both Malachite and Chyrsocolla are copper based minerals that grow in the oxidation zones of copper deposits. There's a group of copper minerals that all psuedomorph after each other, meaning one will take the place of the other. Those in order are Azurite, Malachite, Chrysocolla, and then Shattuckite. The original shape of this piece has been left intact and they just polished the outside to make the colors more vibrant.
This would make an awesome decor piece to provide a natural splash of color and provide a calming atmosphere for whatever room it was placed in.
This piece measures approximately 18cm x 15cm x 12cm