(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.
Turning Sand into Glass. In the glass kiln of Crystal Glass Works at Stourbridge, near Birmingham, England, we can see the first stages of glass making. Sand is shovelled into a very hot furnace and turns into liquid. The liquid glass is then ladled into a drum of cold water. It bubbles and bursts, showing for a moment the delicacy of forms it can achieve. movie file size: 4MB.