Our couture 18k gold gemstone engagement rings or bridal sets collection features classic engagement ring styles with beautiful antique cushion cut gemstone center stones. Our antique cushion cut gemstone engagement rings and bridal sets sparkle with intricate detail and designer style. They feature genuine eco-friendly Chatham-created antique cushion cut alexandrites, rubies, emeralds and a rainbow of sapphires to help you minimze your carbon footprint. Most can also be Custom Mounted with your favorite natural or lab-grown gemstone. With lots of natural diamond accents, you'll get a big look at an affordable price. Our premium quality Precise White finish on most of these gorgeous rings ensures your white gold ring will remain bright white for years to come.