quartz powder specifications and buyers information links

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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: SiO2: 99.7% min; Fe2O3: 100ppm Max. 4-2000mesh as per buyer's spec.
4rd grade SiO2: 99.5-99.6% min; Fe2O3: 150-300ppm Max.4-2000mesh as per buyer's spec.
5. Microsilica Powder
(1) SiO2: 99.90%min; Fe2O3: 10ppm Max.; Al2O3 :50ppm Max; size:300 mesh
(2) SiO2:99.80%min; Fe2O3: 50ppm Max.;Al2O3 :50ppm Max;size:400 mesh
(3) SiO2:99.70%min; Fe2O3:100ppm Max.;Al2O3 :60ppm Max; size :600 mesh
6.NATURAL CRYSTAL POWDER
SiO2: 99.90%min-99.99%min , size:2-300 mesh
7.QUARTZ TUBE: Clear fused quartz tubing, ozone-free or germicidal quartz tubing, uv-block quartz tubing.
http://www.indianindustry.com/minerals/9216.html
http://www.tradekey.com/product_view/id/14518.htm

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