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Collection

Natural Sapphire

Sapphire is corundum in every colour except red. Velvety cornflower blue carries the highest premium, but yellow and purple sapphires offer far more colour per euro and are dramatically under-priced relative to blue.

In stock
10
From
$77.50
To
$267.50
Mohs hardness
9

Gemmology

Family
Corundum
Formula
Al2O3
Hardness
9
Refractive index
1.762 - 1.770
Specific gravity
4.00
Crystal system
Trigonal

Treatment & care

Heat treatment is standard and stable. Diffusion and beryllium treatment exist and materially reduce value, always require disclosure.

One of the toughest gems available. Ultrasonic and steam safe for untreated and heat-treated stones.

Tradition

Birthstone
September
Zodiac
Virgo, Libra
Anniversary
5th & 45th
Chakra
Throat & Third Eye

Linked to wisdom, clarity of thought and truthful speech. Blue sapphire is worked with at the throat chakra.

Common questions

Are sapphires only blue?

No. Sapphire is the name for all gem corundum other than red, which is called ruby. Yellow, purple, pink, green, orange and colourless sapphires are all natural and all correctly called sapphire.

Is sapphire good for an engagement ring?

It is arguably the best non-diamond choice. At Mohs 9 it is second only to diamond in scratch resistance, it has no cleavage plane, and it tolerates daily wear better than emerald, opal or tanzanite.

What is purple corundum?

Purple corundum is purple sapphire. Sellers sometimes use the term corundum when a stone has not been laboratory-certified as sapphire, or to describe material with a colour that sits between pink and purple.

Full sapphire buying guide →