Ross-Simons - .50ct t. w. Sapphire, .22ct t. w. Diamond Ring in 14kt White Gold. Size 8. A beautiful September birthstone gift or the perfect ring for any sapphire lover! Alternating .50 ct. t. w. square sapphires and .22 ct. t. w. round brilliant-cut diamonds together create a stunning look! Set in polished 14kt white gold. 1/8" wide. Diamond and sapphire ring. Sapphire birthstones are the perfect gift for September birthdays.