The Emery Stones dark granular rock used to make abrasive powder. It largely consists of corundum ( aluminium oxide ), mixed with other minerals such as the iron-bearing spinels, hercynite, and magnetite, and also rutile ( titania ). It is a mixture of powdered emery and a suitable binder that can be molded into grinding wheels and other devices. It largely consists of corundum, mixed with other minerals such as the iron-bearing spinels, hercynite, and magnetite, and also rutile. Industrial emery may contain a variety of other minerals and synthetic compounds such as magnesia, mullite, and silica. The offered stones are made for industrial uses. The Emery Stones are very efficient and are easy to use as per the need.