... glaze, glass, porcelain, abrasive materials and other industrys. Potassium feldspar is usually red, white or gray.It has a low melting ... point. It is widely used in ceramics, ceramic glaze, glass, porcelain, abrasive ... and using for making potash fertilizer. It is Best feldspar quality, highest output and lowest price from our company. Product Features:1.Effective ...