This is a beautiful platinum engagement ring. The ring is centered with a lovely GIA certified Australian sapphire that weighs 4.45ct. The sapphire is accentuated by sparkling round cut diamonds that weigh 1.70ct. The color of these diamonds is F-G with VS1 clarity. The top of the ring measures 17mm by 15mm. The ring is stamped Pt900 S4.451 D1.70 and weighs 9 grams. The ring is size 6 1/2 but it can be resized.