Bentonite generally has a hardness of 1-2 (some are relatively hard) and a density of 2-3g/cm3. Also known as porphyry, bentonite or bentonite, it is a non-metallic mineral mainly composed of montmorillonite. It is generally white or light yellow, and due to
Fluorspar is a common halide mineral, which is a compound composed of calcium fluoride and an important mineral for extracting fluorine. Fluorite has many colors and can also be transparent and colorless. Transparent and colorless fluorite