Alumina pebbles, used in ceramic tile, cement, chemical, mineral 95%: size:3-70mm, 20-70 with same price, ... Alumina pebbles, used in ceramic tile, cement, chemical, mineral 95% :Advantages:The products are featured by high hardness, big ... glaze materials, and various powdered ore. They are using ceramics, cements, paints, refractory, inorganic mineral powders and other materials to form ...