February - Amethyst. Adorn yourself with Lafonn's birthstone jewelry. These halo stud earrings are set with genuine round amethysts surrounded by Lafonn's signature Lassaire simulated diamonds in sterling silver bonded with platinum. 5mm Round Amethyst Approx. 0.46ct (0.92ctw), Lassaire Stimulated Stones: 0.34ctw