Month 09 · gemstone almanac
September
birthstone
Sapphire is the blue variety of corundum, though it also occurs in every color except red (which is ruby). Kashmir sapphires are considered the finest, with a velvety 'cornflower blue' color.
Share the September birthstone guide
Immediate answer
Sapphire
- Modern list
- Sapphire
- Traditional list
- SapphireSame as the modern list
- Hardness
- 9 on Mohs scale (second hardest)
- Reference policy
- Primary sources over folklore summariesAlternatives remain visible when a source lists them
Which list are you being given?
September gives the same answer on both lists
Most pages that answer “what is the september birthstone” quote one list without saying which. There are two in common use: the modern American list standardised by the National Association of Jewelers in 1912 and revised since, and the older traditional list that preceded it.
| List | Stone(s) for September | Basis |
|---|---|---|
| Modern | Sapphire | Standardised in 1912 and maintained since; used by current gemological guidesThe list this site leads with |
| Traditional | Sapphire | Older lists predating the 1912 standardisationUnchanged for this month |
What changed: nothing. September kept Sapphire through the 1912 standardisation and every documented revision since, which is why sources agree on it.
The modern list was designed around transparent, faceted gems so that jewellers could set several children's stones in one ring. That commercial motive, not a gemological discovery, is why some months changed. Later revisions added alexandrite and citrine in 1952, tanzanite in 2002, and spinel in 2016.
Neither list is more “correct”: a birthstone assignment is a published convention, not a property of the gem or of the month. If a gift matters, ask which list the recipient grew up with.
Gem facts
Identity, color, and durability
Sapphire is the blue variety of corundum, though it also occurs in every color except red (which is ruby). Kashmir sapphires are considered the finest, with a velvety 'cornflower blue' color.
- Names in use
- Blue Corundum · Padparadscha (pink-orange variety)
- Mohs hardness
- 9 on Mohs scale (second hardest)
Typical color palette
- #0F52BA
- #4169E1
- #FF69B4
- #FFA500
- #FFFFFF
Symbolic tradition
Meanings and crystal traditions
Sapphire symbolizes wisdom, virtue, and good fortune. Its celestial blue color has made it a stone of royalty and clergy throughout history, representing divine favor and protection.
- Symbolic traditions associate sapphire with wisdom and truth
- Royal and religious settings have used sapphire as a sign of loyalty
- Medieval lore treated sapphire as a protective stone
- Modern spiritual readings connect its blue color with reflection
- These interpretations are traditions, not scientific effects
Interpretation label: Personality words such as wise, loyal, truthful, noble, serene belong to symbolic birthstone readings. They are not traits caused by a gemstone or birth month.
Context
History and cultural variations
Sapphires have been treasured since at least 800 BC. Ancient Persians believed Earth rested on a giant sapphire whose reflection colored the sky. Medieval clergy wore sapphires symbolizing heaven.
Earth rests on a sapphire giving sky its color
Symbol of heaven, worn by clergy
Featured in Crown Jewels, Princess Diana's ring
Associated with Saturn, brings luck
Variation note: Historical beliefs are presented as beliefs. A source can document a tradition without proving a physical or medical effect.
Practical guide
Jewelry care and gift ideas
- Clean with warm soapy water and soft brush
- Ultrasonic cleaning is usually safe
- Durable for everyday wear
- Store separately to protect other gems
- Have prongs checked regularly
Care note: Treatments, inclusions, and settings can change safe cleaning methods. Ask a qualified jeweler when a stone's treatment history is unknown.
Budget ideas
Sapphire accent jewelry · Small sapphire pendant · Lab sapphire earrings
Mid-range ideas
Sapphire ring · Sapphire tennis bracelet · Natural sapphire earrings
Premium ideas
Kashmir or Ceylon sapphire · Star sapphire ring · Padparadscha sapphire