"Rock Tumbler grit", also known as "rock polishing grit", is usually a silicon carbide powder that is much harder than the types of rocks that are commonly polished in a very rock tumbler. If it is tumbled in a very barrel with rocks and water the abrasion caused with the https://campusrecruitment48269.wikipowell.com/5630787/3_physical_properties_of_silicon_carbide_secrets