Metallurgical Grade Specs.: ( 1) CaF2: 75% min SiO2: 24% max ( 2) CaF2: 80% min SiO2: 19% max ( 3) CaF2: 85% min SiO2: 14% max ( 4) CaF2: 88% min SiO2: 11% max ( 5) CaF2: 90% min SiO2: 9% max ( 6) CaF2: 92% min SiO2: 7% max ( 7) CaF2: 95% min SiO2: 4% max The content of other chemical elements such as S, P, CaCO3 etc. are different according to different vein. Size : 10-50mm 90% min or At Buyers' Options Packing : 1MT/ Bag or At Buyer' s Options Quantity : 3000-5000MTS/ Month