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

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

Blue sapphires have a noble and deep hue, with the deep blue known as royal blue being especially valuable. Since ancient times, sapphires have been used as jewelry for royalty and nobility, 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.