Selecting A Sharpening Stone: Understanding The Differences In Materials. The three most common types of sharpening stones are oil stones, water stones, and diamond stones. Each of these stones has its own advantages that can help users achieve their sharpening goals. Oil Stones
GRINDING WHEEL and ABRASIVES BASICS. ... Grinding wheel specification. Grit type and color. Grit size. Wheel hardness. Structure. Bonds. Diamond and CBN Wheels. Diamond and CBN basics Identifying your Diamond or CBN wheel. ... and stone products such as marble and granite. Black silicon carbide is a very sharp grit.