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; iron-rich tourmaline black; rich in lithium, manganese and cesium were pink tourmaline, also pale blue; chromium-rich dark green tourmaline; we do mainly black. Hardness 7 to 7.5; density of 3.03 ~ 3.25g/cm3. 
 As the hot tourmaline with piezoelectric and other unique physical and chemical properties, therefore, has a far-infrared band of electromagnetic radiation, producing negative ions and antibacterial, deodorant and other functions. 
 Temperature and pressure changes can cause tourmaline crystal potential difference, so that ionize the surrounding air, hit the electronics attached to the adjacent water and oxygen molecules and ions make it into the air, that negative oxygen ions. Production of negative ions in the air and water droplets. Charge and the combination of these particles together into a ball and sink, so as to achieve the purpose of purifying the air. Inside the fiber to add tourmaline powder, 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, tourmaline powder added to the polyester melt, the polyester fiber can be given to the four features and functionality, that far-infrared thermal features, deodorizing, negative ion emission feature (at room temperature produces negative ions) and some anti-bacterial , called "exotic fibers." 
 The use of pyroelectric tourmaline, can be prepared care coatings, acoustic-electric materials, health products, etc., used to purify the air, water and human health. Spontaneous use of electrodes of tourmaline can purify industrial waste, improve drinking water quality, such as for the adsorption of heavy metal ions, adjust the PH value of water to improve the activity of drinking water. 
 Specifications: 1CM about tourmaline Tourmaline ,4-8MM ,2-4MM ,1-2MM tourmaline tourmaline tourmaline ,0.3-1MM ,20-40 mesh ,40-60 mesh tourmaline tourmaline ,60-80 mesh electrical tourmaline stone ,80-100 mesh, 100 mesh tourmaline, tourmaline 150 mesh, 200 mesh tourmaline, tourmaline 325, tourmaline 400 mesh, 600 mesh tourmaline, tourmaline 800 mesh,,, and 20 × 20 × 1CM tourmaline plates, specifications are available upon request to produce.