Brosway Round Amethyst Earrings by BroswayMetals: Silver Stones: magic purple zircons Finishes: no finish Earring Size: 10,5mm Collection: FANCY Sterling silver is made of at least 925 parts of silver and not more than 75 parts of any other metal and its worked using the precision casting or lost wax casting methods. All silver jewelry is plated with a layer of rhodium to ensure increased shine and slow down the natural oxidation of silver. Sterling silver jewelry is therefore hypoallergenic