Crystal Nail Gems are made of high-quality materials that are not harmful to the human body, can be easily applied to natural or artificial nails, Our 3D nail crystals add sparkle and glamor. Make your nails more dazzling and charming. With multiple color options, you can design your own special nail art at will. Multiple Applications. You can decorate your nails, crafts, clothes, shoes, bags, face, eye makeup, body art, cell phone and glass case, fabric, wedding dress, books, guitars, license plates, etc.