5.2 Carat Lab Grown Diamond Esma RingLab Grown Diamond Esma Ring Emerald cut Three Stone The Esma Ring carries three elongated emerald cut diamonds over a round glossy gold sleeve. The genuine diamonds are lab grown to perfection and feature flashy geometric step cuts. The timeless three stone style is celebrated with a subtle redesign in form. One of the biggest challenges with traditional three stone rings is finding a matching band that fits neatly alongside them. With this in mind,