
Mac then moves on to setting the stone. He begins by using a hart burr to cut a precise seat inside each prong—essentially a small notch that holds the marquise diamond level and secure over time. Using a wax dop, he carefully lowers the stone into place.

Once he confirms that it’s sitting evenly, he gently squeezes the tips of the prongs over the top of the diamond, locking it in. Finally, the entire ring is cleaned, polished, and steamed to achieve the perfect finish.