Talc / TiO2 / Barium Sulfate / CaCO3

Talc is a hydrothermal alteration mineral. The magnesium-rich mineral is often changed into talc by hydrothermal alteration, so talc is often shown as olivine, refractory pyroxene, amphibole and diophanite. Talc is a common silicate mineral that is very soft and slippery to handle. Ten minerals have been chosen to represent the ten hardness levels, known as mohs, of which the first (and softest) is talc. Soft talc can take the place of chalk to draw white marks. Talc is generally blocky, leaf - like, fibrous or radiate, white and off-white in color, and will carry a variety of colors due to the presence of other impurities. Talc has many USES, such as refractory materials, paper, rubber filler, pesticide absorbent, leather coating, cosmetic materials and carving materials.
Titanium dioxide (TiO2) is an important inorganic chemical product, which is used in coating, ink, paper making, plastic rubber, chemical fiber, ceramics and other industries. Titanium dioxide, a white pigment made from titanium dioxide. Titanium dioxide, or TiO2, is a polycrystalline compound with a regular lattice structure. Titanium dioxide has the smallest relative density. There are two processes of titanium dioxide production: sulfuric acid process and chlorination process.