Rhodium-Plated Sterling Silver Onyx Faceted Square Pendant Necklace Elegant Sterling Silver necklace featuring a Faceted Square Onyx Pendant 18" Rhodium-plated Sterling Silver Rope chain necklace with spring-ring clasp Due to the natural properties and composition of mined gemstones, pieces may vary slightly in size, shape, weight and color. Onyx is commonly treated and impregnated with polymers to enhance its color and improve its stability. Imported