(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.
SAND USED FOR GLASS MANUFACTURING Silica (quartz) sand is also used in glass manufacture. Quartz comprises 50-65% of the mix used to make glass. The high purity of dune sand makes it especially useful in some glass manufacturing. The quality of sand used for glassmaking is highly restrictive.ilica sand is the major component of glass, foundry molds, and abrasives. It is also used in ceramics, on golf courses, and as a filter medium. In the midwest, the major uses of the sand are in the foundry and automotive industry operations. Dune sand has a number of uses.