One pound of pure tin oxide, 99.9% pure. Tin oxide is an excellent polish for cabochons, faceting, flat lapping, or tumbling many gemstones. We never used anything other than tin oxide, 99.9% pure for flat lapping and got great results. (One exception was rhodonite that tends to undercut when flat lap polishing, although tumble polishing rhodonite with tin oxide gave very good results.) There are many types of tin oxide sold. Make sure the tin oxide is 99.9% pure. An order of one is for a one pound package.