The birthstone for September is the sapphire. The sapphire is a gemstone known for its beautiful blue color and is highly valued worldwide.

The sapphire is a type of corundum, a mineral made of aluminum oxide. While the blue color is the most well-known, sapphires come in other colors as well. For example, pink sapphires are called "pink sapphires," and yellow sapphires are sometimes called "padparadscha." However, the common image of a sapphire is the blue variety.

Blue sapphires have a noble and deep hue, with the deep blue known as royal blue being especially prized. Since ancient times, sapphires have been used as jewels by royalty and nobles, symbolizing nobility and preciousness.

Sapphires are very hard and durable, making them suitable for use in jewelry. They are popular for wedding rings and special gifts.