The detail specification as follows: 1.Quartz Sands (Silica Sands) High purity grade: SiO2: 99.95%min-99.8%min Fe2O3: 3ppm max-30ppm max, size: 2-200 mesh high purity silica sand, quartz stone Deliberated grade: SiO2: 99.8%min-99.0%min Fe2O3: 50ppm max-0.03% max, size: 2-325 mesh 2.Natural Crystal Powder SiO2: 99.90%min-99.99%min, size: 2-300 mesh 3.Fused Quartz Ingot SiO2: 99.9%min Fe2O3: 50ppm max, Al2O3: 0.03% max, size: 5-100 mesh 4.Quartz In Lump Special grade: SiO2: 99.9%min, 1st grade: SiO2: 99.8%min Fe2O3: 0.004%max 2nd grade: SiO2: 99.7%min Fe2O3: 0.008%min 3rd grade: SiO2: 99.5%min Fe2O3: 0.03%min. 5.Micro-silica Powder SiO2: 99.5%min-99.0% min, Fe2O3: 0.02%max, Al2O3: 0.3% max, size: 200-800 mesh 6.Fused Quartz Powder SiO2: 99.9%max, Fe2O3: 50ppm max, size: 2-325 mesh Contact person: Ms.Zhaojing