Silicon is the second most abundant element in our Earth’s crust, making it a frequent component of many construction materials including soils, clays, sands, cements, mortars, stuccos, and stone. It is not inherently dangerous as pure silicon, however a particular molecule of silicon can be lethal when inhaled: silicon dioxide. Silicon dioxide, also called silica, or known as quartz, is the major constituent of sand and is highly toxic in dust form. Freely breathing in finely divided crystalline silica can in fact cause such fatal diseases as silicosis, lung cancer, and some autoimmune diseases in high enough concentrations. Three types of common construction practices, for example, including sandblasting, cementing, jackhammering and/or rock drilling all expose a construction worker to this unique breathable threat.