Ross-Simons - Black Onyx and Black Enamel Ring in 18kt Gold Over Sterling. Size 8. Pop this ring on when your look needs an intense touch. A horizontally set 10x5mm black onyx baguette glints of the center of the 18kt yellow gold over sterling silver band, which gleams with sections of glossy black enamel. Polished finish. 3/16" wide. Black enamel and black onyx ring. Opal Drop Earrings, Onyx Colour, Woven Ring, Lapis Ring, London Blue Topaz Ring, Onyx Jewelry, Blue Topaz Earrings, Black Onyx Ring, Enamel Ring