Tormaline powder is a fine powder obtained after the mechanical crushing of tormaline ore, following the removal of impurities. Processed and purified tormaline powder has a high negative ion generation rate and far-infrared emission rate. Tormaline is also known as tourmaline. The chemical formula for tourmaline is NaR3Al6Si6O18BO33(OH,F)4, which represents a group of cyclic silicate minerals in the trigonal crystal system. In this formula, R denotes a metal cation; when R is Fe2+, it forms black crystal tourmaline. Tourmaline crystals are nearly triangular in columnar shape, with different crystal forms at both ends, a columnar surface with longitudinal streaks, and are commonly found in columnar, needle-like, radiating, and massive aggregates. They have a glassy luster, with a resinous luster on the fracture, and are semi-transparent to transparent.

Mohs hardness 7-7.5, specific gravity 2.98-3.20. Piezoelectric and pyroelectric properties.