Royal Crystals"Made with Swarovski Crystals" Sterling Silver Aurora Borealis Twist Earrings Measurements: 33mm/1.29 inches long and 10mm/0.39 inches wide Sterling silver twist earrings These aurora borealis earrings have leverback closure. The drop earrings have coating at the back AB and that gives them the unique color. These adorned with Swarovski Crystals earrings are not Swarovski earrings (product). Crystals from Swarovski are used to craft the sparkly Royal Crystals earrings.