100% natural finely ground Tripoli widely known as silica. Tripoli is also known as Rottenstone, Quartz, Tripoli Fine Powder, and Diatomaceous Earth. It is used in different help to create a smooth, flawless complexion. Tripoli is a must-have for a jewelry polishing kit. Rottenstone is a natural polishing powder perfect for jewelry, metals, glass, and non-metal surfaces. It is also perfect for polishing wood and other soft surfaces. Quartz sand powder is a great filler or extender for plastics, rubber, and sealants. Tripoli fine powder is perfect for cement, a pigment in paints, or improving the coating and flow of paints.