18k white golds double "diamond by the yard" chain with ring clasp, adorned with 18k white gold pendant with hinged bail and safety catch, set with cushion cut purple amethyst color spinel, estimated weight 8.50 ct, and framed with round brilliant cut diamonds, total estimated diamond weight 1.00 ct, VS-SI1 clarity, G/H color; marked on the bail and clasp; overall weight 9.5 gm.