The gorgeous chrysocolla gemstone cabochon shown here is 35mm long.
Like malachite, chrysocolla has a high copper content, which is what gives it that fabulous blue/green colouring. The name comes from the Greek chrysos, (gold), and kolla, (glue).
It is believed to have a calming influence, and also to attract love. It is supposed to help heal burns, fever, and detoxify the liver.
I used this cabochon to create this custom piece: