Mikimoto Vintage Leaf Solitaire Japanese Saltwater Akoya Cultured Pearl Ring- Sterling Silver Sz 6This is a simple but beautiful & authentic Mikimoto Japanese akoya saltwater cultured pearl solitaire leaf ring. The pearl is 6. 25mm round. It has fantastic luster with bright rosy overtones. The pearl is surrounded by four leaves with two of them being higher than the others to give it some depth. It is set in solid sterling silver. It is stamped "M" in a clamshell for Mikimoto and "S" in a square for silver. Ring size is 6 US. From 1950's 1980's.