We are a mineral company in Guizhou China. We have our own barites minerals in Wengan Guizhou China. We are mining more than 100000 tons every year. The detail of our product: BaSO4: 97% MIN. SrSO4: 1.5% MAX. SiO2 : 0.05% MAX. CaO: 0.5% MAX. Fe2O3: 0.5% MAX. S.G. : 4.30g /cm3 MIN. SIZE: 1 -100MM 90%MIN. PACKED IN BULK.