CAUTION: Some of these materials are toxic in their dry unfired or fired state. You should always use a dust mask when working with these materials. We have an inexpensive, Toxic Dust Mask available. Also Material Safety Data Sheets are available on request or can be downloaded from MSDS Search. These materials have always been potentially harmful, so let’s get serious about safe handling. cobaltcopper Cobalt Oxide 1/4 pound CoO2-14$19.00 Cobalt Carbonate 1/4 pound CoCO3-14$13.15 Copper Carbonate 1/2 pound CuCO3$4.82 1/2 pound CoO2-12$35.00 1/2 pound CoCO3-12$23.90 1 pound cuco31$8.75 1 pound CoO-1$62.00 1 pound CoCO3-1$42.50 5 pounds CuCO3-5$41.55 5 pounds CoO2-5$294.50 5 pounds CoCO3-5 10 pounds CuCO3-10$79.00 10 pounds CoO2-10$559.60 10 pounds CoCO3-10 25 pounds CuCO3-44$177.75