Tourmaline is characterized by a kind of aluminum boron, sodium, iron, lithium-ring structure (poly crystal, single crystal, fiber) silicate minerals. Its color varies with the composition; black iron-rich tourmaline; rich in lithium, manganese and cesium were pink tourmaline, also pale blue; chromium-rich dark green tourmaline; we do mainly black. Hardness of 7 to 7.5; density of 3.03 ~ 3.25g/cm3. 
 Because tourmaline hot sex with piezoelectric and other unique physical and chemical properties, therefore, have far-infrared band of electromagnetic radiation, production of negative ions as well as antibacterial, deodorant and other functions. 
 Changes in temperature and pressure can cause a potential difference of tourmaline crystals so that ionize the surrounding air, was hit in the electronic attachment to the nearby water and oxygen molecules and make it into the air ions, the negative oxygen ions. Production of negative ions in the air and water droplets. Charge and the combination of these particles gather into a ball and sink, so as to achieve the purpose of purifying the air. The fiber to add fine powder of tourmaline, its fibers the number of dynamic and static up to 1500 to 3500 negative ions / cc, equivalent to the urban park environment anion content. Therefore, ultra-fine powder of tourmaline adding the polyester melt after the polyester fiber can be given to the four features and functionality, that is far-infrared thermal features, deodorizing, negative ion emission feature (the negative ion at room temperature) and some antibacterial function , called "singular fiber." 
 Use of the pyroelectric properties of tourmaline can be prepared by health-care coatings, acoustic and electromagnetic materials, health products, etc., used to purify air, water and human health. Spontaneous use of electrodes of tourmaline can purify industrial waste water and improve drinking water quality, such as for adsorption of heavy metal ions, regulate PH value of water bodies to improve the activity of drinking water. 
 Specifications: 1CM about ,4-8MM ,2-4MM ,1-2MM ,0.3-1MM ,20-40 mesh ,40-60 mesh ,60-80 mesh ,80-100 mesh, 100 mesh, 150 mesh, 200 mesh, 325, 400 mesh, 600 mesh, 800 mesh,,, and 20 × 20 × 1CM the plate, the specification can be requested to produce.