Tiffany & Co. Onyx Bead Necklace With Engraved Toggle Clasp - 925

This is a classic Tiffany & Co. 8 mm onyx bead necklace, with an engraved and hallmarked sterling silver toggle clasp. Tiffany has been making this design, as well as other types of necklaces and bracelets with toggle clasps since the 1980's. It was sent for third party authentication, and has a certificate of authentication. It was also sent to an AI stone identification site. It features uniform size onyx beads that are individually knotted. The toggle clasp is imprinted with TIFFANY & CO. and is hallmarked 925. It measures 18" long and is in excellent condition. AI description: "The beads are uniformly deep black with a smooth, high-polish vitreous surface and strong mirror-like reflections — the classic appearance of black onyx (a dark variety of chalcedony) used in bead necklaces. The round, well-matched bead shapes and the style of stringing are consistent with gemstone beads seen in quality jewelry."