Gorgeous Elegant Tiffany & Co 18K Rose Gold 8 MM Luminescent Gray Moonstone Statement Ring. This gorgeous ring holds a stunning 8 mm luminescent gray moonstone. It is fully engraved: TIFFANY & CO AU 750. It is size 3 and a good candidate for sizing. It weighs 3.1 grams. It is in truly excellent condition. It comes in its Tiffany storage pouch. Please visit my ebay store for unique estate jewelry. Thank you.