18k Australian Opal Cameo Important

this outstanding Australian Opal Cameo Ring is out of this world. mid century made in japan. maker unknowm mark visable in the second photo. hard to capture the majesty of this piece on camera. the rises and dips cause issues with a focus on the camera. This ring has a real pressence to it and reminds you it's there with its magnificence. large and imposing. one of a kind