Halo Diamond Stud Earrings Natural Amethyst Stone Round Cut Weight 0.90 Cts . These Gorgeous Halo Earrings Are a Classic And Timeless Design That Will be Treasured for Years to Come. This Halo Earring has a White Diamonds 0.51 Cts . The setting is available in 18K white gold. These are Screw Back which Means that you will Never have to Lose one and can keep them on Always..