Description: Tiffany & Co. Cabochon Sapphire 18k Yellow Gold Dome Band Ring Size - 6. This authentic Eternity band ring from Tiffany & Co. It is crafted from 18k yellow gold and has six round cabochon cut blue sapphire gemstone mounted around the entire band in bezel setting. It has Tiffany's hallmark and metal content. Material: 18k yellow gold. Hallmark: Tiffany & Co. 750 Italy Measurements: Band is: 5mm wide x 3.5mm high Sapphire: 60 points Ring Size: 6 Weight: 5.8 grams Stock#: 55388