.925 Sterling Silver 10X10 MM Cushion Purple Amethyst and Diamond Accent Halo 18" Pendant Necklace (I-J Color, I1-I2 Clarity)Suspended in splendor, this regal . 925 sterling silver necklace features a mesmerizing 10x10 mm cushion cut purple amethyst, treated to enhance color, its facets catching light with every movement thanks to a stunning checkerboard cut. Natural and inviting, the amethyst centerpiece is enveloped in a luminous halo of diamonds, each selected to harmonize with the gemstone's royal hue and secured in rhodium plated silver to enhance their innate sparkle.