Round Black Onyx Floral Twisted Rope Ring Oxidized. • Metal Type: Sterling Silver. • Metal Stamp or Hallmark: .925 • Metal Purity: 92.5% Sterling. • Gemstone: Black Onyx. • Gemstone Creation Method: Simulated. • Face Measurements From South To North: 10mm (0.39 inch). • Ring Design: Black Onyx Floral Twisted Rope Ring Oxidized. There is something so retro about this art deco flower ring that it brings a sense of edginess. The flower design on the front of the ring and the oxidized (blackened) finish of the sterling silver band creates a very striking look. The vibrant black onyx stone in the centre makes it such a great place to wear many outfits, and to be versatile between casual and formal wear!