onyx signet ring silver.Onyx Signet Ring in Silver. By Kristy Lee Jewellery. Solid Sterling Silver Black Onyx Signet Ring. Size: OS Care Instructions: Avoid prolonged exposure to water, sweat and chemicals. Clean gently with a polishing cloth if needed. Store jewellery separately and away from moisture, heat and direct sunlight. Gold plating will naturally wear over time. Re plating is available through Kristy Lee Jewellery if needed. Each piece is handmade on site at Kristy