Tourmaline powder is a kind of powder obtained by mechanical crushing after removing impurities from tourmaline raw ore. The tourmaline powder after processing and purification has high anion production and far-infrared emissivity. Tourmaline is also called tormaline. Tourmaline has a general chemical formula of nar3al6si6o18bo33 (oh, f) 4. Its crystal belongs to a group of ring-shaped silicate minerals in the cubic system. Where R represents metal cation, when R is Fe2 +, it forms black crystal tourmaline. Tourmaline crystals are nearly triangular columnar, with different crystal shapes at both ends. The surface of the columnar surface is longitudinally striated, often in columnar, acicular, radial and massive aggregates. Glass luster, fracture rosin luster, translucent to transparent. No cleavage. The hardness is 7-7.5 and the specific gravity is 2.98-3.20. There are piezoelectric and thermoelectric properties.