... material with hardness below 5 such as calcium carbonate, talcum powder, bauxite, kaolin, diatomaceous earth, detonate, grapphite, limestone, calcite, marble stone ... stone, rectories, alum stone, fluorspar, tablet ore, potassium ore, pumice, iron oxide red, iron oxide green, aluminum oxide, dye, papermaking, burning inhibitor, building materials, pesticide.