Take your look up a notch when you wear this cushion-cut black onyx and diamond collar with grooved shank ring in 10k gold. Crafted in warm 10k gold diamond-lined collars highlight a 12. 0mm cushion-cut rich black onyx at the center. Along the tapered shank, the raised grooved center and diamond-adorned stepped borders add texture and depth. This ring captivates with 1/4 ct. T. W. Of diamonds.