Corundum is a versatile mineral that has a wide range of industrial and commercial applications, as well as being a popular gemstone. Here are some of the uses of corundum:

• Abrasive: Corundum is an abrasive material that is used in various industrial applications such as grinding media, polishing compounds, sandpapers, grinding wheels, and cutting tools.

• Refractory: Corundum is highly resistant to heat and chemically inert, making it useful in refractory applications such as making refractory products.

• Electrical Insulator: Corundum is an excellent electrical insulator, making it useful in electrical and electronic applications. It is used to manufacture insulating parts for electrical equipment, such as insulators, circuit breakers, and high-voltage bushings.

• Catalyst Support: Corundum is used as a catalyst support in a range of industrial processes. It is used to support catalysts in the production of chemicals such as ammonia, methanol, and hydrogen.

• Gemstone: High-quality corundum crystals, such as ruby and sapphire, are highly valued gemstones that are used in jewelry and other decorative applications.

• Polishing and Lapping: Corundum is also used as a polishing and lapping material due to its hardness and fine grain size. It is used to polish and lap a variety of materials, including metals, glass, and ceramics.

• Screens and Parts in Satellites: Corundum has a litany of industrial uses from abrasives to screens to parts in satellites.

Overall, corundum is a tough, hard, and chemically stable mineral that is used in a wide variety of industrial and commercial applications.