M.S. Rau Antiques carries one of the world's finest selections of rare, untreated emerald jewelry for sale, including exquisite Art Deco emerald rings, necklaces, bracelets and Colombian emerald earrings in a wide variety of shapes and cuts.As the May birthstone, this green-colored beryl mineral gemstone was highly prized by various cultures throughout history. First documented by the Ancient Egyptians in the 3rd century BC, it was rediscovered in present-day Colombia where communities of Incas and Aztecs wore it in ceremonial objects. Since then, these precious stones have become centerpieces in Russian crown jewels and long been associated with royalty from many cultures. Emerald items are also a traditional gift for couples celebrating their 55th wedding anniversary. From large emerald engagement rings over 4 carats to one-of-a-kind trapiche emerald jewelry and pear shaped emerald necklaces, M.S. Rau showcases some of the finest estate jewelry around. Natural, untreated emeralds are amongst the rarest and most precious of all gemstones, particularly those hailing from the mines of Colombia. Our selection of these fine colored gemstones are is unparalleled and we are pleased to offer these unique, natural green emeralds for sale.