You will need to use an alternate with a hardness of more than seven within the Mohs scale; normally, you can just be losing electricity by operating your tumbler. The condition is what you help you save in the price of the sand; you are going to make up for https://www.quora.com/profile/Trevor-Flatcher-2/Exploration-of-Silicon-Carbide-Application-in-Friction-Materials-https-iflatiron-com-exploration-of-silicon-carbide-a