What is Silica?   “Silica is one of the most common minerals in the earth’s crust. Glass, beach sand, silicone, and granite are all silica materials. There are two forms of silica – crystalline and noncrystalline. Crystalline silica is a bigger worry for the health of our lungs.” (http://depts.washington.edu/silica/silica.html)   How To Take Precaution ∙”Know […]