1pc crystal sphere is part of the package, diameter refers to the size. Material : Lapis lazuli Diameter : 4.3cm , 4.8cm , 5.3cm , 5.8cm , 6.3cm , 6.8cm , 7.3cm , 7.8cm Material -- The lapis lazuli crystal ball is crafted from natural crystal quartz. Wide Range -- The lapis lazuli roller ball is for home decor, studies, figurines, living rooms, kitchens, collections, and feng shui.