CERIUM OXIDE, 99.99%, 4N, RARE EARTH, CERAMIC/GLASS SUPPLY, 250, 500, 1000, GRAMS Small Packages under ONE Pound will now Ship First Class Mail This is High purity Cerium oxide, low purity is used for polishing Cerium(IV) oxide, also known as ceric oxide, ceric dioxide, ceria, cerium oxide or cerium dioxide is an oxide of the rare-earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2. It is an important commercial product and an intermediate in the purification of the element from the ores. The distinctive property of this material is its reversible conversion to a nonstoichiometric oxide.[2 Testing Policy: Testing of raw materials should be an integral part of ceramic or glass making / manufacturing. Upon receipt of any new material, we strongly recommend that you test the material. “Paul Brown Studio Arts and Supplies” . has no control over either the variations that may occur in the natural materials or their application. All products are supplied as is from the manufacturer. No additional processing or technical support is supplied. Therefore, our products are sold with the understanding that the user is solely responsible for determining suitability for any purpose and the results obtained. There are no warranties expressed or implied, regarding the user’s finished product or results. ——————————————————————————————————————————————————————————————————————————————————————– NO RETURNS