C. 1990. Bold, balanced and undeniably stately, this Estate collection ring celebrates the high-impact harmony of two iconic gemstones. A fi… C. 1990. Bold, balanced and undeniably stately, this Estate collection ring celebrates the high-impact harmony of two iconic gemstones. A fiery .77 carat square princess-cut diamond center anchors the elegant statement, while deep, oceanic-blue .98 ct. t.w. square sapphires and timeless .51 ct. t.w. round brilliant-cut diamonds create a stunning symmetrical design. Crafted in polished platinum. 5/8" wide. Diamond and sapphire ring. Exclusive, one-of-a-kind Estate Jewelry.