We are an leading exporter of barite in China.We have our own factory in Guizhou Province.Please fell free to contact us for competitive price and good quality.1.WHITE GRADEBASO4:97%min S.G.:4.35g/cm3 min Whiteness:93-95 degree min, Size:99% min passing through 325mesh.BASO4:96%min S.G.:4.25g/cm3 min Whiteness:90-92 min2.Chemical GradeBASO4:95%min S.G.:4.25g/cm3 min3.Oil Drilling GradeAPI 13A standard and OCMA standardAnyway,we shall do our best to meet your idea.Thank you for your kind attention.