Lab Grown Sapphire Versailles Half-Coverage Diamond Engagement Ring (1/3 ct. tw.) - 18K Yellow Gold. Alternating round and marquise diamonds create an alluring pattern in this chic and distinctive engagement ring (1/3 total carat weight). Pear Diamond Engagement Ring, Pear Diamond Rings, Three Stone Diamond Rings Engagement, Marquise Diamond Engagement Ring, Three Stone Diamond Ring, Rose Gold Diamond Ring, Three Stone Diamond, Diamond Ring Settings, Marquise Diamond