Source Assessment: Crushed Sandstone, Quartz, and
There are 362 plants in the United States which produced 24.3 x 106 metric tons3 of crushed sand- stone, quartz, and quartzite in 1972, accounting for 2.9% of the output of the aggregate industry (crushed limestone, granite, stone, sand, gravel, sandstone, quartz, and quartzite).
