... , 20-100mm, 60mesh, 120mesh,200, 325mesh Potash Feldspar lump , as K fertilizers Potassium feldspar is silicate mineral with rich potassium, characterizes ... , 120mesh,200mesh, 325mesh or as requestAppearance: colored white or pinkK2O: 12.0-14.0%Na2O: 2.0-3.0%Al2O3: 18 ... ,MilkyWhite,Blue,Gray,No-colour E0759, Potash Feldspar lump, as K fertilizers