September birthstone: Sapphire
Sapphire illustration
September wears sapphire: usually the classic blue, sometimes a whole candy case of fancy colors.
What sapphire is
Sapphire is corundum. Blue sapphire gets its color mainly from iron and titanium. Anything in the corundum family that is not sold as ruby falls under the sapphire umbrella, which is why pink, yellow, and padparadscha stones are still sapphires.
How September got sapphire
Modern Western birthstone lists assign sapphire to September. Loyalty and sky metaphors clung to blue sapphire in marketing long before SEO existed.
Birth month vs zodiac gems
Virgo and Libra span September. Their gems do not replace sapphire as the month stone.
Find your weekday
Use the birthday calculator to see the weekday behind your September birthday.
Common questions
What is the September birthstone?
Sapphire, typically pictured as blue corundum, is the primary September stone in modern Western lists.
Are pink and yellow sapphires still sapphires?
Yes. Any corundum that is not called ruby is sapphire, including fancy colors. Blue remains the best-known look for September gifts.
Is star sapphire different?
It is still sapphire with a needle-like inclusion pattern that creates a star under a cabochon cut. Same mineral, specialty optical effect.