Crystalline Silica
Crystalline silica is a common mineral found in the earth's crust. Materials such as sand, stone, concrete and mortar contain crystalline silica. It is also used to make products such as glass, pottery, ceramics, bricks and artificial stone.
Respirable crystalline silica – very small dust particles at least 100 times smaller than ordinary sand you might find on beaches and playgrounds – is created when cutting, sawing, grinding, drilling, and crushing stone, rock, concrete, brick, block and mortar.