quartz powder specifications and buyers information links
list of buyers http://www.tradekey.com/buyoffer_list/cid/0895/Quartz-Products.htm The detailed specifications are as follows: 1. Quartz (Silica) Sand powder and stone high purity grade: SiO2:99.60%min-99.98%min ; Fe2O3 :1-35ppm Max.; size:2-200 mesh refined grade: SiO2 :99.50%min-99.90% min ; Fe2O3 : 50-300ppm Max.; size:2-325 mesh General grade:SiO2 :98.00%min-99.50% min ; Fe2O3 : 400 -1200ppm Max.; size:2-400 mesh 2. 2. Quartz (Silica) Stone special grade: SiO2: 99.96%min; Fe2O3: 4ppm Max. 1st grade: SiO2: 99.90%min; Fe2O3: 40ppm Max. 2nd grade: SiO2: 99.80%min; Fe2O3: 100ppm Max. 3rd grade: SiO2: 99.60%min; Fe2O3: 300ppm Max. 3. Fused Quartz (silica) Lump1st grade: SiO2:99.9%min;Fe2O3: 30ppm Max. 2nd grade: SiO2:99.8%min;Fe2O3:60ppm Max. 3rd grade:SiO2:99.7%min; Fe2O3:100ppm Max. 4.Fused Quartz (Silica) Powder 1st grade: SiO2: 99.9% min; Fe2O3: 30ppm Max. 4-2000mesh as per buyer's spec. 2nd grade: SiO2: 99.8% min; Fe2O3: 60ppm Max. 4-2000mesh as per buyer's spec. 3rd grade...