It's a practical tool for jewelry polishing. It can clean all kinds of gold, silver, copper jewelry. Suitable for gold, sterling silver, platinums, jewelry and other metals polishing. Use the faux agate knife to rub on the jewelry, so that your jewelry will be as new. Essential tools for calligraphers, jewelers and bookbinders both professional and hobbyist. When grinding jewelry, you can add some water or polishing oil in an appropriate amount, the effect will be better. high in quality, safe and convenient to use Agate Burnishing Tool: Ideal for smoothing imperfections in metals and closing bezels. It can cleaning all kinds of gold, silver, copper jewelry, very convenient to use. Jewelers Burnishing Tool: Essential tools for calligraphers, jewelers and bookbinders both professional and hobbyist. Package list: 1 * Faux Agate Knife.