Superhard materials are substances that possess exceptional hardness, making them resistant to scratching and deformation. The most well-known superhard material is diamond, which is formed under high-pressure and high-temperature conditions deep within the Earth. Other examples include cubic boron nitride and aggregated diamond nanorods, which are engineered for specific industrial applications. These materials are widely used in various industries, particularly in cutting, grinding, and drilling tools. Their durability allows for increased efficiency and longevity in manufacturing processes. Research continues to explore new superhard materials and their potential applications in technology and engineering.