Sapphire: Meaning, Symbolic Properties, Care

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Sapphire is the variety of corundum in every colour except red, best known in blue. Hardness 9. Heating is common; synthetic sapphires and imitations exist.

Key points

Colour	Mainly blue; also pink, yellow, green, violet, colourless, orange (padparadscha)
Mineral family	Corundum, aluminium oxide (Al2O3)
Mohs hardness	9
Cause of the blue colour	Iron and titanium
Deposits	Kashmir, Sri Lanka, Madagascar, Myanmar, Thailand, India, China, Brazil, Africa, Australia; France (Auvergne, small deposits)
Common treatment	Heating to improve colour and clarity
Notable varieties	Star sapphire (rutile needles), padparadscha (pinkish orange)
Birthstone	September (traditional list)

What is sapphire?

Sapphire is a gem variety of corundum, a mineral of aluminium oxide (Al2O3). Pure corundum is colourless; small impurities give it its colour. The blue comes from iron and titanium, yellow and green from iron, pink from chromium, and violet from vanadium. The only corundum that is not called sapphire is red: it is called ruby.

With a Mohs hardness of 9 (on a scale from 1 to 10), sapphire is one of the hardest natural materials. It is one of the four precious gemstones.

The most prized blue sapphires come from Kashmir and Sri Lanka (formerly Ceylon). They are also mined in Madagascar, Myanmar, Thailand, India, China, Brazil, Australia and several African countries. France even has small artisanal alluvial deposits in Auvergne.

Varieties and famous stones

Star sapphire: fine needles of rutile form a six-pointed star on a cabochon. The "Star of India" is a famous example.
Padparadscha: a very rare pinkish-orange sapphire, whose name evokes the lotus flower in Sinhalese; the name is mainly linked to Sri Lanka.
Coloured sapphires: yellow, pink, green or violet, sometimes called "fancy".

Among famous stones are the "Star of India", the "Logan", the "Stuart" and the "Grand Saphir" of Louis XIV. It is also worth noting that in antiquity, the Greek ancestor of the word "sapphire" probably referred to a different blue stone, most likely lapis lazuli, not today's corundum: this is the usual view of historians, though it remains debated.

Traditional symbolism

Blue sapphire has long been linked to the sky, wisdom and loyalty. It is associated with serenity, clarity of mind and right speech. In many cultures it evokes nobility, faithfulness and commitment: it appears in well-known engagement rings.

These meanings are cultural traditions and symbols, not demonstrated effects on health, luck or success.

Traditional correspondences

Area	Common association
Chakra	Throat (see the throat chakra) or third eye, depending on the blue
Element	Water or air, depending on the source
Signs	Virgo, Libra, Sagittarius or Taurus depending on the author; the lists vary
Month	September, traditional birthstone (see September)

How to use it

In a ring or pendant: its hardness of 9 makes it an ideal stone for jewellery worn every day.
As beads or cabochons: for jewellery that is more affordable than quality faceted stones.
As a gift: a September birthstone, or a wedding anniversary gift (sapphire is traditionally associated with the 45th anniversary).

See the guide to gemstone jewellery.

Cleaning and cleansing

Cleaning: lukewarm water, mild soap, soft brush. An uncracked sapphire tolerates this care well.
Cracked or filled sapphire: avoid ultrasonic cleaners, steam and chemical products.
Impacts: despite its hardness, a violent blow can break it along a fissure.
Sunlight: most sapphires are not harmed by light; however, some yellow or orange sapphires may fade, so as a precaution avoid prolonged exposure.
Symbolic cleansing: incense smoke, moonlight, or placing it on selenite. See the guide to cleansing and recharging your stones.

Treatments, synthetics and imitations

Heating is the most common treatment, used to improve colour and clarity. It is recognised in the trade provided it is disclosed. Other treatments exist; only a laboratory can identify them with certainty.

Synthetic sapphires have been made since Auguste Verneuil invented his process in 1902. They have the same composition as natural sapphire, but they are created in a laboratory: they are used in industry (watch crystals, optics) and in low-cost jewellery. In older specimens, curved growth lines help to identify them.

Imitations: blue glass, blue spinel, or blue-violet stones such as tanzanite or iolite (wrongly called "water sapphire", a name that is discouraged).
A very large and very cheap "sapphire" is almost always something else.

For any important purchase, ask for a laboratory certificate. Our guide to choosing and caring for your stones explains these points in detail.

How to choose your sapphire

Colour is the first criterion: a vivid blue, neither too pale nor too dark. Transparency, size and origin also matter. Sapphires of prestigious origin (Kashmir) are worth much more, but stones from Madagascar, Thailand or Australia are more affordable alternatives. Sapphires in cabochon or bead form, often less transparent, are the most accessible.

It pairs well with lapis lazuli, aquamarine or ruby, its red twin. See the jewellery section.