Abrasive mineral is a term used to describe minerals that are hard and have a rough surface, making them useful for grinding and polishing. GARNET (6 letters), EMERY (5 letters) and CORUNDUM (8 letters) are all examples of abrasive minerals. GARNET is a group of silicate minerals that come in a variety of colors and is often used as an abrasive in sandpaper. EMERY is a dark granular rock composed of CORUNDUM, magnetite, and other minerals, and is used as an abrasive in polishing and grinding. CORUNDUM is a crystalline form of aluminum oxide and is the hardest naturally occurring mineral after diamond. It is also used as an abrasive in grinding and polishing.