Sapphire glass is a synthetic material made from aluminum oxide, known for its exceptional hardness and scratch resistance. It is often used in high-end watches, smartphone screens, and optical devices due to its durability and clarity. Unlike regular glass, sapphire glass can withstand extreme conditions without easily breaking or scratching. The manufacturing process involves heating aluminum oxide to high temperatures, which allows it to crystallize into a transparent form. This material is not only strong but also has a high level of transparency, making it ideal for applications where visibility and protection are essential, such as in smartphones and luxury watches.