The modern birthstone(s) for September are Sapphire. Traditional birthstone(s) are Sapphire, Lapis Lazuli. Zultanite — gem-quality color-change diaspore from Türkiye — is not an official September birthstone.

Modern birthstone

The modern September birthstone list, established by the American National Association of Jewelers in 1912 and updated periodically since, includes: Sapphire.

Traditional birthstone

The traditional birthstone list (drawing from older European and Polish gem-month associations) for September includes: Sapphire, Lapis Lazuli.

Where Zultanite fits

Not an official September birthstone. Sapphire (corundum, 9 Mohs) is harder than Zultanite (6.5–7 Mohs).

How birthstone lists work

There is no single global authority on birthstones — modern, traditional, mystical (Tibetan), and Ayurvedic lists all differ. Zultanite was discovered too late (commercial production began in the early 2000s) to enter any of the historical lists.