Although blue sapphire is the most popular with designers and the public. Sapphire actually comes in all colors except red. The red ones are called Rubies, many places have sapphire deposits with the most popular ones being Myanmar, Ceylon, Sri Lanka, Madagascar and now Nigeria. Sapphires and rubies are both made of corundum and the color differences come from traces of iron titanium and chromium. A moh’s hardness of 9 makes them some of the most durable gems with only diamonds being harder with the exception of man made moissanite coming in between with a hardness of 9.5 on the moh’s scale of harness.