The first industrial use of garnet was as an abrasive. Garnet is a relatively hard mineral with a hardness that ranges between6.5 and 7.5 on the Mohs scale. That allows it to be used as aneffective abrasive in many types of manufacturing. When crushed,it breaks into angular pieces that provide sharp edges for cuttingand sanding. Small granules of uniform size are bonded to paperto produce reddish color sandpaper that is widely used in woodworking shops. Garnet is also crushed, screened to specific sizes,and sold as abrasive granules and powders.