Quartz Grits Home Quartz Grits QUARTZ 0.1 – 0.3MM QUARTZ 0.3 – 0.7MM QUARTZ 0.7 – 1.2MM QUARTZ 1.2 – 2.5MM QUARTZ 2.5 – 4.0MM QUARTZ 4,0 - 6,0MM QUARTZ 0.4 to 0.8 mm