18K Gold Natural Black Opal Diamond RingA marvelous natural black opal ring with a gorgeous matrix pattern that reveals an enchanting array of blue flashes that glistens and glows from every angle almost like if youre looking at the northern lights through the ring! Embellished with a sparkling halo of glimmering white diamonds. Hand fabricated in gleaming 18K gold, the ring currently measures size 6. Specifications: Measurement of Opal: 0. 8 inch by 0. 5 inch Measurement of Ring Face: 1. 1