Sapphire is the birthstone for people born in September. 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. Discover Sapphire Jewellery by the world's most exciting designers.