This is one big, heavy cabochon! This is Chrysocolla & Cuprite from Mexico, collected by Benny Fenn. Not only does it have lots of Cuprite, the Chrysocolla appears greener than most of what I've cut so far. A big beauty!

Dimensions: 48mm x 28mm x 8mm.  Weight: 98.30 carats.

This cabochon is in my personal collection; it is not available for sale.