Quartz: Mineral has multiple quality varieties (grades) that determine its applicability in a given industry. After mining the rocks in a crude form were sorted for quality via processing machines. Thereafter, they are downsized in a variety of sizes, depending on the requirement of a customer to fulfill various industrial needs. Specifications : Lumps : 50 - 150 MM Chips : 1 - 5 MM Powder : 325 Mesh (Microns) 30 Mesh (Microns) Type : Sodium Feldspar, Potassium Feldspar, Quartz, Ball Clay, Limestone, Dolomite