Rare Diamonds · An Editorial Guide
Pink
Diamonds
A specialist guide to natural pink diamonds: how their colour forms, why they are exceptionally rare, how laboratories determine natural colour and grade intensity, and which factors influence quality, desirability and value.
What is a pink diamond?
A rare colour written into the crystal itself.
A natural pink diamond is a fancy colour diamond whose pink appearance developed during its formation within the Earth. It is composed principally of carbon and has the same exceptional hardness as a colourless diamond, yet an unusual alteration within its crystal structure changes the way it absorbs and returns light.
Natural pink diamonds range from delicate blush and rose tones to saturated purplish pink and orangy pink. Red diamonds belong to a separate and exceptionally rare colour category. Pink diamonds must also be distinguished from treated and laboratory-grown stones. An independent grading report should confirm that the diamond is natural and that its colour is of natural origin.
Origin of colour
Why are pink diamonds pink?
Unlike blue or yellow diamonds, the colour of the vast majority of natural pink diamonds is not primarily produced by a trace chemical element. GIA research links the pink appearance mainly to plastic deformation and distortion within the diamond crystal lattice, associated with stress experienced after crystal growth.
This deformation can create microscopic coloured lamellae or graining associated with a broad absorption band near 550 nm. Their strength, distribution and relationship with the cut influence whether the finished diamond appears softly rose, intensely pink or modified by purple, brown or orange.
In a pink diamond, the colour is the visible record of extraordinary pressure deep within the Earth.
Geological origins
Where do natural pink diamonds come from?
Pink diamonds have been recovered from deposits in Australia, Africa, Brazil, Russia and Canada, but meaningful production has always been extremely limited. For decades, Rio Tinto’s Argyle mine in Western Australia was the best-known consistent source of rare pink, red and violet diamonds, particularly stones with distinctive purplish-pink and reddish tones.
Argyle ceased production on 3 November 2020 after 37 years of operation. Its closure did not end the existence of pink diamonds, but it removed the market’s most recognisable recurring source. Important pink diamonds continue to emerge from other deposits, and geographic origin should never be assumed from colour alone.
Colour grading
How pink diamonds are graded.
Fancy colour grading considers the diamond’s characteristic colour, including hue and colour intensity. A laboratory report identifies the dominant colour, any modifying hue and the official intensity grade. In pink diamonds, modifiers such as purple, orange and brown can create distinctive character, while saturation, tone, distribution and overall visual balance influence desirability.
Colour is assessed under controlled conditions because subtle distinctions can have a substantial effect on rarity. Carat weight, clarity, cut, fluorescence and colour distribution are considered alongside the full laboratory description.
Delicate blush colour with a refined, airy appearance.
Clearly visible pink with balanced tone and saturation.
Strong, concentrated colour with notable presence.
Exceptional saturation and one of the most coveted grades.
A darker tone with richness and dramatic depth.
Rarity and value
What determines a pink diamond’s value?
Colour quality is usually the leading consideration: dominant hue, intensity, tone, distribution and overall beauty. Carat weight becomes particularly important because most natural pink diamonds are small, making larger stones with strong, even colour exceptionally scarce.
Cut should enhance the colour while preserving weight and brilliance. Clarity, shape, fluorescence, provenance and the reliability of the grading report also matter. Record auction prices illustrate demand for exceptional examples, but no diamond should be presented as a guaranteed financial investment.
Exceptional examples
Famous pink diamonds.
These celebrated stones reveal the extraordinary range of natural pink diamonds, from delicate historic gems to intensely saturated modern auction icons.
The CTF Pink Star
An oval mixed-cut, 59.60-carat Fancy Vivid Pink, Internally Flawless diamond. Sold by Sotheby’s Hong Kong in 2017 for US$71.2 million, it set the world auction record for any diamond or jewel at the time.
The Williamson Pink Star
A cushion-shaped, 11.15-carat Fancy Vivid Pink, Internally Flawless Type IIa diamond. It sold at Sotheby’s Hong Kong in 2022 for US$57.7 million and set a world auction record price per carat for any diamond or gemstone.
The Graff Pink
A 24.78-carat Fancy Intense Pink Type IIa diamond with a classic step-cut form and distinguished provenance. It sold at Sotheby’s Geneva in 2010 for approximately US$46.2 million, then an auction record for any diamond or gemstone.
The 6.95 ct Purplish Pink
A cushion modified brilliant-cut, 6.95-carat Fancy Vivid Purplish Pink Type IIa diamond with VVS2 clarity, presented by Phillips for its Geneva Jewels Auction in 2025. The lot was subsequently withdrawn before the sale.
The Desert Rose
A 31.68-carat pear-shaped Fancy Vivid Orangy Pink diamond with VVS1 clarity. GIA documentation described it as the largest Fancy Vivid Orangy Pink diamond graded by the laboratory as of the date of its accompanying letter; it sold at Sotheby’s Abu Dhabi in 2025.
The Daria-i-Noor
One of the world’s largest historic pink diamonds, traditionally estimated at about 182 carats and known for its pale rose colour, broad table cut and place within the Iranian National Jewels.
Private sourcing & bespoke design
From rare colour to personal jewel.
A natural pink diamond should be considered in relation to the person who will wear it, the design and the individual character of the stone. Through a private consultation in Monaco or remotely, I can help assess hue, intensity, modifiers, proportions, grading documentation and setting direction for a bespoke engagement ring or high jewellery commission.
Every project begins with a conversation and proceeds only when the creative and gemological direction feels right.
Discover BespokePink diamond questions
Frequently asked questions.
Are pink diamonds natural?
Some pink diamonds are natural, while others are treated or laboratory-grown. An independent grading report should confirm whether the diamond is natural, whether its colour is of natural origin and whether treatment has been detected.
What makes a pink diamond pink?
In most natural pink diamonds, the colour is associated with distortion in the crystal lattice rather than a trace element. This structural deformation changes how the diamond absorbs visible light.
Are pink diamonds rarer than colourless diamonds?
Yes. Natural pink diamonds represent only a very small part of diamond production. Large stones with strong, evenly distributed pink colour and attractive clarity are exceptionally rare.
What is a Fancy Vivid Pink diamond?
Fancy Vivid Pink describes a diamond with exceptionally strong and saturated pink colour. It is among the most desirable intensity grades, although hue, tone, modifiers and visual balance must also be considered.
What happened to the Argyle pink diamond mine?
Rio Tinto’s Argyle mine in Western Australia ceased mining in November 2020 after 37 years of operation. Existing Argyle stones remain in private collections and the secondary market, but the mine no longer produces new diamonds.
Can a pink diamond be used in an engagement ring?
Yes. Diamond is suitable for everyday wear, and a pink diamond can make an exceptional engagement ring. The setting should protect the stone and support its colour without overwhelming it.
How should I choose a natural pink diamond?
Start with an independent grading report, then assess hue, colour intensity, modifiers, distribution, cut, clarity, fluorescence, provenance and how the diamond appears in different lighting conditions.
Do pink diamonds increase in value?
Exceptional natural pink diamonds have historically attracted strong collector demand because of their scarcity. However, future value is never guaranteed, and each stone should be judged individually rather than marketed as a certain investment.
