The Stuff you set into the tumbler specially to shine the rocks in the ultimate stage is often made of cerium oxide, tin oxide, chrome oxide, or aluminum oxide. It's really a method of grit customarily known as a polishing compound and is amazingly great. In this article and accompanying https://www.quora.com/profile/Trevor-Flatcher-2/Comparative-analysis-of-silicon-carbide-and-traditional-silicon-materials-Silicon-Carbide-vs-Traditional-Silicon-Mater