"This is a stunning deco antique Japanese akoya saltwater cultured pearl ring. The pearl is 7.50mm round. It has great luster with rosy overtones. Nice quality. It is set in solid sterling silver. It is stamped \"S\" in a square, an old mark for sterling. US size 5. Japan 1930's-1940's. All pearls are truly vintage and have only been lightly cleaned. Some tarnish and patina on metal." Special Engagement Ring, Cultured Pearl Ring, Rings Cool, The Pearl, Ring Sterling Silver, Pearl Ring, Cultured Pearls, Sterling Ring, Rings Statement