Absolutely stunning Lightning Ridge Black Crystal Australian Opal Ring 14 Karat Yellow and White Gold Rind . .45 Carats of White and Yellow Diamonds . This is a natural earth mined opal , untreated and solid . We cut and polished the stone and designed the setting . This is a handmade piece 1:1 . Photos and video do not do it justice !! I am always open to reasonable offers . Ring size 7.5