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Quartz Grains 0.1-0.4 mm, 0.3-0.7 mm 0.6-1.2 mm 1.2-2.4 mm 2.4-4.0 mm Quartz Powder 150-250 microns Lumps form 1 Inch to 15 inches Our Customers - Ceramic (White-ware) Quartz Stone Oil Well Drilling Insulator industries Paint Water Filtration