Magnetic pigment powders are a type of nail polish additive that can be used to create unique and striking designs on the nails. These powders are made from tiny particles of iron oxide that are suspended in a gel or liquid base. When the powder is applied to the nail and a magnetic wand is held close to the nail, the particles align and create patterns that appear to move or shift. These powders can be used to create a variety of designs such as lines, waves, and geometric shapes. They can be applied over regular or gel nail polish and can be cured under UV or LED light.