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Glass Grade Silica Sand for colored glass production 50,000 MT per year FOB West Coast port, USA Silicon dioxide (SiO2) 91.2 , 92.8 Iron oxide (Fe2O3) 0.11 , 0.20 Aluminum oxide (Al2O3) 3.2 , 4.5 Sodium oxide (Na2O) 0.10 , 0.4
