This incredible piece of Natural Ethiopian Opal has very special formation of a white opal within a crystal clear body. The opal has been cut to an oval cabochon shape. The marble like patterns across the opal have green and blue fire colors. Must see video! WATCH A VIDEO OF THIS OPAL. Copy the YouTube Link to your Browser - https://youtu.be/Q0EksLJRXNQ 100 % Natural Opal Opal Weight: 50.0 Carat Opal Size: 34 X 36 X 11 mm Opal Cut By: Gabriel M. We now offer custom jewelry designs. Let us create a one of a kind piece just for you! Please browse our collection of loose Natural Opals, and contact us for more details.