Tourmaline

● About Tourmaline

A complex silicate of boron and aluminum, calling"imperial seal" of the gems in China, whose composition varies widely because of substitutions. Tourmaline appear various colors ,for example black (schorl), blue (indicolite), pink and red (rubellite), brown (dravite), green, multicolored, rarely white; vitreous; streak white. Hexagonal, usually short to long prismatic crystals that commonly have a rounded triangular cross section, striated lengthwise; also radiating, columnar, compact..

Tourmaline is natural mineral of many elements ,its chemical compositions are: Boron( B), magnesium(Mg), aluminium( Al), silicate, its chemical formula is: (Na,Ca)(Mg,Fe)3B3Al6Si6(O, Whether OH,F) 31 and a-SiO2 contain V not micro- of, Cr, Zr, Mn, Ti, and elements helpful to the human body, such as Sr, Ga2O3,etc.. The hardness of tourmaline is generally about 7.3-7.6, the relative density is 3.03-3.25. Tourmaline has inexistent physics and chemistry characteristics that other minerals own, for instance: piezoelectricity, thermo-electricity,, anion and far infrared, etc..

? Established in 1985, we Yanxi Minerals Co.,Ltd. is located in the area of Taihang mountain Hebei province China, which is famous for it's mica, vermiculite, quartz etc. resources. We have two branches in Shijiazhuang city and TianjinCity, which take charge of sale of products and after service. Yanxi minerals processing factory lies in Lingshou County which belongs to Shijiazhuang City Hebei province, only 240km to Beijing, and 320km to Tianjin Port, so it is very convenient for products? transporting and export.Our factory is one of the largest processing factories specialized in vermiculite and mica in China,has sets of advanced machine to process vermiculite, mica, quartz, perlite, feldspar etc. nonmetal minerals. Thus we can process various grades and sizes of minerals as per customers? request. It is a modernized company gathering minerals' processing, technology developing and sale of mica, vermiculite, quartz etc. products. We can process and sale minerals more than 100000mt annually.For many years, we take the quality as our basic element for living. We invest much in buying various advanced equipment for production, quality control and inspection as well as engage higher technicians in conducting production to guarantee good quality. We have our own storage in Xingang port, which is one of the biggest ports in China and assign special personnels to take charge of all the normal forwarding duties, checking weights, packaging and loading. Our products are exported to Japan, Korea, Southeast Asia, Europe etc. countries and areas widely used in building material, horticulture, ceramic, metallurgical, insulation, refractory, chemical, machinery, light-industry, abrasive and aerospace industries etc..Yanxi will devote attention to continuing to improve the quality of it's products, it's distributing system, logistic net work, customer service network and e-business platform to be the leading supplier of nonmetal minerals in China.