Ross-Simons - 4.50ct Sapphire Ring, Diamond Accents in 14kt Yellow Gold. Size 8. Made to be noticed, this ring is a stunner. A 4.50 carat oval sapphire is bezel-set in gleaming 14kt yellow gold and lit on either side with round brilliant-cut diamond accents. It's a must-have for any sapphire lover or September-born beauty. 1/2" wide. Sapphire ring. Sapphire birthstones are the perfect gift for September birthdays.