This is an elegant 18k yellow gold onyx ring. The ring is centered with a lovely cushion cut blue topaz that weighs approximately 15.00ct. The center stone is accentuated by square and modified pentagon cut rubies that weigh approximately 3.00ct. The top of the ring measures 24mm by 27mm. The ring weighs 24.5 grams. The ring is size 9 1/2 but it can be resized.