Imagine a concrete floor as shiny as glass—this is a look that diamond polishing can achieve. Two years ago very few people in the United States had even heard of polished concrete other than terrazzo floors. Terrazzo floors use carborundum stones to grind and polish floors to a 120- to 150-grit finish (grit refers to the micron particle size of the diamonds or other grinding abrasive material). Diamond-polishing technology now makes it possible to grind and polish much faster on concrete surfaces at up to 3000-grit finishes.