If you were born in September your birthstone is the sapphire. Similar to a ruby, a sapphire is a variety of corundum that adorns a deep blue color. The name sapphire comes from the Latin word for “blue stone,” sapphirus. One of the benefits of sapphires is their hardness, registering a 9 on the Mohs hardness scale (diamond is a 10). This means it’s a strong and sturdy gemstone that you don’t have to worry about getting scratched. It also means this gem is useful for industrial that take heavy wear and tear.

You can find deep blue sapphires from Kashmir in India, which is known for producing some of the best sapphires in the world. You can also find sapphires in Australia and Madagascar. The corundum takes on the blue coloring from trace amounts of both titanium and iron.