Black tourmaline product
A: Color: less than 200mesh, take on deep black-black
200-1250mesh, take on deep grey-grey
25000 mesh, take on offwhite
B: Granule: 30-25000mesh
C: Grade: Choose the most high-quality raw materials, deal with through the surface, make the grade improve by 95-98%.
D: Chemical component:
SiO2: 34.81% Al2O3: 35.10% Fe2O3: 10.18% B2O3:11.02% MgO:4.70%
Na2O: 0.91% K2O:0.04% CaO: Minim P2O5:0.22% TiO2:0.26% FeO: 1.35%
Our product generally approved and praised in numerous countries and companies of the area such as Japan, South Korea, Taiwan, because of our company choose high-quality ore, advanced processing apparatus, fine process, body of superfine powder and nanometer powder supplied.