A list showing different sizes of quartz sand used in industrial, construction, or decorative fields. Quartz size 0.50 half millimeter. Quartz size 1 millimeter. Quartz size 2 millimeters. Quartz size 3 millimeters 1- From 0.5 mm 2- Size 0.6-1.2 mm 3- Size 1.2-2 mm 3 - Size 2-3 mm Decorative sea sand for aquariums, plants, and vases