14K Blue Green Solid Australian Opal Ring with Diamond This Genuine Australian Opal measures 8mm x 6mm and weighs 0.95c. It has lovely Pinfire Sparkles in Blue, Green, and Gold. With some hidden larger Red/Orange Flashes seen on occasion. The Base is not as dark of Grey as the photos show - it is a very soft grey with ivory tones. I have placed it into this 10K Yellow Gold Ring, with a 2mm Diamond accent stone. A simple, classic ring setting for a Classic Opal! In the photos, the Opal ...