Sapphire is the official birthstone for the month of September as adopted by the American National Association of Jewelers in 1912. It is also one of the birth stones for the Zodiac signs of Pisces, Taurus, Virgo and Sagittarius.

Sapphire is the non-red variety of corundum (the red variety of corundum is ruby). A 9.0 on the Mohs scale of hardness, sapphire is the second hardest natural mineral.

Blue is by far the most popular color for sapphires.