The gemstone for your month of birth which is September is Sapphire.
Sapphire is a variety of the mineral species corundum. Sapphires occur in all colors of the rainbow with the exception of red, which is commonly called ruby.
Sapphire is mined in Australia, Sri Lanka and Thailand. Other producers are Kenya and Tanzania in East Africa. Sapphires are commonly heated to improve their color and reduce cloudiness that is caused by rutile inclusions. The rutile inclusions are responsible for the "star" or "cat's eye" in star sapphires.
It goes well with diamonds and both white and yellow gold in jewelry.
You can visit; www.diamond-rings-info.com/diamond-and-sapphire-rings.html and learn more.