Industrial Minerals: O - Z - Arkansas Geological Survey
Phosphate Rock Quartz (Industrial) Quicklime Salt Sand & Gravel Sand, . Clear, colorless, untwinned quartz crystals had important uses as oscillators in radio equipment and in . Some crushed milky quartz was mined in Saline County and used as . Howard, J. M., and Stone, C. G., 1988, Quartz crystal deposits of the.