Engraved Grape Cluster Blue Japanese Saltwater Akoya Cultured Pearl Vintage Ring- Sterling Silver 6.50This is a stunning high quality mid century Japanese blue akoya saltwater cultured pearl grape cluster ring. The pearls are 4. 25 6. 25mm round with a medium blue gray bodycolor and pink overtones. They have multicolor overtones and few blemishes. It is set in solid sterling silver with hand detailed grape leaf design. It is stamped "SILVER" "950" which is slightly more pure than standard sterling. It is a US size 6 1 2. From Japan 1950's. All pearls