Abrasive powder suitable for pre-polishing or final polishing. Chemical composition: 84% SiO2, 10% Al2O3. Tripoli polishing powder is a fine powder used as a polishing and abrasive medium for metals, glass, gemstones, and other materials. This powder is made from a natural mineral called "tripoli" or "diatomaceous earth", which is a sedimentary rock composed of fossilized remains of tiny organisms. Tripoli polishing powder is fine and lightweight, making it easy to use for fine grinding and finishing. Tripoli polishing powder is used to remove small imperfections on the surface of materials when a fine and glossy finish is desired. It is also used in jewelry making and in the cosmetic industry for polishing teeth and nails. Tripoli polishing powder is used in combination with water or oil to create a paste that is applied to the surface of the material. The surface is then rubbed in circular motions using a soft cloth until the desired appearance is achieved. Tripoli polishing powder can also be used as part of a mechanical grinding or polishing process.