14K Yellow Gold Black Enamel Octagon Diamond Medallion Necklace. This sophisticated 14K yellow gold necklace features a black enamel octagon medallion with diamond accent that hangs on 16 cable chain with 2 extender that closes with lobster claw clasp. Pendant diamensions: 18x10mm aka Diamond Necklaces Luxury Enamel Necklace With Polished Finish, Luxury Enamel Necklaces With Polished Finish, Luxury Polished Enamel Necklaces, Luxury Rectangular Pendant Jewelry With Cable Chain, Luxury Enamel Locket Jewelry, Formal Black Enamel Pendant Necklace, Luxury Black Enamel Pendant Necklace, Formal Black Enamel Necklaces, Formal Black Enamel Necklace