13 Carat Pave Diamond & Onyx Necklace 18k Yellow GoldThis 18 karat yellow gold necklace alternates between black onyx links and pav diamond sections along its 16. 5 inch length. The piece holds 242 round brilliant cut diamonds totaling 13. 00 carats with VS1 VS2 clarity and F color. The curb link chain design gives the necklace structure and weight, sitting bold at the base of the neck. The black and white contrast creates a graphic, striking effect when worn.