This is a stunning genuine pearl necklace with handknotted 6 MM silver pearls, closed with  14k Solid white gold clasp that is set with pearls and sapphires. The clasp is marked "H" and 14k. This piece is from the 1960's or 1970's at my best estimate. The pearls are genuine cultured pearls as best as I can tell, and pretty high quality. The clasp is unusual and also very high quality. The necklace is 26 inches long total length with 6 mm pearls, that's over 100 pearls. The clasp is 5/8 inches lo Classic Tahitian Pearl Necklace With Round Beads, Formal Single Strand Tahitian Pearl Necklace, Classic Tahitian Pearl Necklace With High Luster, Classic Round Tahitian Pearl Necklace, Classic Tahitian Pearl Necklace In White Gold, Elegant Tahitian Pearl Jewelry With Round Beads, Classic White Gold Tahitian Pearl Necklace, Formal Tahitian Pearl Necklace, Elegant Single Strand Tahitian Pearl Necklace