(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.
Glass is formed by heating sand to its melting point. Objects are then either cast or blown to their desired shape and allowed to cool slowly. Glass is made from a mixture of sand and other materials. Just regular sand can be made into glass, but it must be heated to about 3,000 degrees Fahrenheit.