Stunning Australian Koroit Opal with amazing pattern and neon bright veins rainbow color Huge 75.85 carats 37 x 25 x 9mm AU $680 inc free post

Stunning Koroit Opal Nut with rivers of brilliant neon bright color. Double sided , one face with brilliant color over entire face and the back shows part of the central nut Huge 75.85 carats 37 x 25 x 9mm Free shipping includes registered post with tracking number AU $680 inc free post