Rhodium is used to plate white gold, yellow gold or sterling, it's more reflective & keeps long lasting color. In the other, the good Rhodium plating gives the metal more bright, shiny & long-lasting in silver-colored. The Oxidized between the metal & air will not effective the color with good Rhodium plating.
High end earrings with natural Citrine, Garnet and Amethyst set in rhodium plated sterling silver. 5.9 carats total. Stones are 1.5x1.25mm. See picture for more sizes.