Sapphire is a gemstone made up of the mineral corundum, which is a type of aluminum oxide. It is a hard, durable stone that is often used in jewelry and other decorative items.

Sapphires can come in a variety of colors, including blue, pink, yellow, green, and white, but blue is the most well-known and sought-after color.

Sapphires are known for their beautiful luster and are often cut and polished into faceted or cabochon shapes. They are also believed to have healing properties and are associated with spiritual transformation and protection.