The birth stone for September is sapphire. Sapphire is gemstone variety of corundum and can be found in hues of blue, yellow, pink, purple, orange, or greenish color. The most common variety is dark blue. Sapphires mostly come from Thailand, Sri Ranka, Tanzania, Madagascar and Australia. Some are produced in the United States, China, Cambodia, Nigeria and Kenya as well. The hardness of sapphire on Mohs scale is 9.