Brand: Tiffany & Co. Type: Heart Knock Onyx Total length: 21 cm (8.27 in) Actual size measurement Material: Silver 925 cm (364.17 in) Color: Black series x Silver series Accessories: None Condition: Used Bare metal. Slight scratch, fine scratch, Tarnish, discoloration Onyx.a little Scratches There is some fraying on the fastening thread. There is some signs of use overall, but this item can still be used. so us if it is at different times. Stone type: Onyx Size notes: Maximum width: 13 mm (0.51 in) Bead Width: 8 mm (0.31 in)