Diamond, Black Onyx, 18k Yellow Gold Necklace. Featuring one hundred and seventy-eight round brilliant-cut diamonds weighing a total of approximately 7.00 cttw., accented by ten graduated black onyx segments ranging in width from 20 mm to 8.5 mm, set in an 18k yellow gold articulated collar mounting, completed by a tongue and groove clasp with figure eight safety, forming a 15 inch necklace. {Gross Weight: 96.7 dwts} Note: Evidence of glue peeling on underside, one onyx segment loose.