(April 2015) Corruption in Brazil exists on all levels of society from the top echelons of political power (as seen in the MensalÃ£o Scandal and the Operation Car Wash and the Petrobras scandals) to the smallest municipalities.
Quartz sands, which are high in silica content, are used to make glass. When quartz sands are crushed they produce particles with sharp, angular edges that are sometimes used to make sandpaper for smoothing wood. Some quartz sand is found in the form of sandstone.
Soda-lime Glass is the most commonly available glass and contains both sodium and calcium. This type of glass is used for windows in buildings, bottles and jars and can also be used cost-effectively to make tubes, rods, plates and finished glassware components.