Silicosis is a progressive and irreversible chronic lung disease caused by inhalation of respirable crystalline silica. Although one of the oldest recognized occupational diseases and fully preventable, silicosis is not a disease of the past. Silicosis remains an important cause of chronic respiratory disease worldwide. Silica is one of the most abundant natural minerals, and inhalation of respirable crystalline silica (hereafter “silica”) can occur in a wide range of industries, including construction, mining, quarrying, manufacturing, and the production and finishing of stone products, such as kitchen and bathroom countertops.