We are offering potash feldspar lumps. potash feldspar lumps are used in glass and ceramic industry as the fluxing agent. The potash feldspar lumps provided by us are known for their purity and finest composition formula. Potash feldspar lumps are used in ceramics, fillers, glazes paint, mild abrasives, frits, enamels, welding electrodes, etc. the different forms of potash feldspar that we offer to our customers are granular particlespowder form ( 15-25 microns)lumps from 1 to 15 inches in size