Sand, Silica Sand, Quartz, Crystalline Silica, Flint, Ground Silica.
Crystalline silica exists in several forms, the most common of which is quartz.
It is not flammable, combustible or explosive. It does not cause burns or severe skin or eye irritation. A single exposure will not result in serious adverse health effects. There are some studies that show excess numbers of cases of scleroderma and other connective tissue disorders in workers exposed to respirable crystalline silica. Tuberculosis Silicosis increases the risk of tuberculosis.