Our company, Liao ning Xiang Ou Crystal Materials Company, is major in producing the SrTiO3 crystals, Nb: SrTiO3 crystals, MgO crystals, TiO2 crystals and some kinds of powder about the crystals. For example:Magnesium Oxide Powder, Strontium Titanate Powder and other materials. Through researching by our technical workers for a long time, we can supply high purity magnesium oxide powder, which purity can reach 99.99%. We can control the impurity in 100PPM by controlling the temperature. We can supply gemstone use crystal rough.