This is One Pound of Copper Carbonate used for Ceramics and Glass coloring, 325 mesh, ceramic grade. ............................................................................................................................................................................. 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. 

Return Policy: No Returns are accepted