Engagement Ring Modern .50 Old Mine Cut Cushion Cut Diamond in PlatinumThis ring is a beautiful fusion of modern and vintage. While the setting of the ring is modern the center diamond is a . 50 carat Old Mine cushion cut diamond set in a bezel. The center diamond is surrounded by square cut blue sapphires and the thin band is set with six (6) round brilliant cut diamonds, three (3) on each side. Made in platinum, this ring has a bright white finish and delicate milgrain detailing around the stones.