Rich Coober Pedy opal colours in an 18Kt white gold ring. The long oval shape 8 x 20mm and a high dome 3.85mm shows red, green and blue. Look at it in a different light and you can see yellow and orange as well! On each side an 8point diamond. Half round band 3.6mm in the front tapered to 2.9mm in the back. Weight 8.43grams. Ring size O