"Rock Tumbler grit", also known as "rock polishing grit", is really a silicon carbide powder that is much harder than the types of rocks that are commonly polished within a rock tumbler. Whether it is tumbled in a very barrel with rocks and water the abrasion caused with the grit https://silicon-carbide-plate79246.tkzblog.com/28813517/an-unbiased-view-of-silicon-carbide-thin-films