About Sapphire
Sapphire is corundum in every color except red, which is ruby. September birthstone sapphires are usually blue, from cornflower to deep navy.
Sapphire has symbolized wisdom and truth for centuries, and blue sapphire remains the most popular colored engagement stone after diamond.
Color and Quality
The best blue sapphires show vivid, even blue without grey or green dominance, and look blue in both daylight and indoor light.
Cornflower blue and vivid royal blue command the highest prices, while pale and dark blues cost less and suit different tastes.
Durability and Wear
Sapphire rates 9 on the Mohs scale, hard enough for daily rings in any setting, and well suited to pendants and earrings.
Most sapphires are heat treated to improve color, which should be disclosed. Untreated fine sapphires cost far more.
Choosing and Gifting
Choose sapphire by face-up blue color first, then by clarity and cut, and ask about treatment disclosure.
Sapphire suits September birthdays and fifth and forty-fifth anniversaries traditionally, and pairs well with white gold and platinum.
September Birthstone: Sapphire FAQ
What color is September birthstone?
Blue sapphire, from cornflower to deep navy, with vivid even blue valued most.
Can sapphire be worn daily?
Yes. At 9 on the Mohs scale, sapphire suits daily rings in any setting.
Are sapphires treated?
Most are heat treated to improve color. Treatment should be disclosed, and untreated fine stones cost more.
What does sapphire mean?
Sapphire traditionally means wisdom, truth, and loyalty, which suits September birthdays and engagements.