This is a gorgeous 18k gold engagement ring. The ring is centered with a lovely cushion cut royal blue even color Ceylon sapphire that weighs 6.57ct. The sapphire is accentuated by sparkling round cut diamonds that weigh approximately 0.50ct. The color of the diamonds is G with VS clarity. The top of the ring measures 12mm by 11.5mm. The ring is stamped 18K and weighs 5 grams. The ring is size 6 3/4 but it can be resized.