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Tourmaline powder is the powder obtained by mechanically crushing the original tourmaline ore after removing impurities. The processed and purified tourmaline powder has higher anion generation and far infrared emissivity. Tourmaline is also called Tourmaline. Tourmaline  general chemical formula is NaR3Al6Si6O18BO33 (OH, F.). 4, the crystal belongs to trigonal system family of cyclic structure silicate minerals in general. In the formula, R represents a metal cation. When R is Fe2 +, it forms a black crystal tourmaline. Tourmaline crystals are in the shape of nearly triangular columns, with different crystal shapes at both ends. The columns have longitudinal stripes, often in the form of columns, needles, radials, and massive aggregates. Glass gloss, broken resin gloss, translucent to transparent. No cleavage. Mohs hardness 7-7.5, specific gravity 2.98-3.20. There are piezoelectricity and pyroelectricity .