Rare Diamonds · An Editorial Guide
Pink
Diamonds
A considered guide to natural pink diamonds: how their colour forms, why they are exceptionally rare, how laboratories grade them and what distinguishes the finest stones.
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, orangy pink and, at the rarest extreme, red. They must be distinguished from treated and laboratory-grown stones. An independent grading report should confirm that both the diamond and the origin of its colour are natural.
Origin of colour
Why are pink diamonds pink?
Unlike blue or yellow diamonds, the colour of most natural pink diamonds is not primarily produced by a trace chemical element. Gemological research links the pink appearance to distortion in the diamond crystal lattice, created by immense geological forces after or during growth.
This deformation produces microscopic coloured bands that selectively absorb light. Their strength, distribution and relationship with the cut determine whether the finished diamond appears softly rose, intensely pink or modified by purple, brown, orange or red.
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, the Argyle mine in Western Australia was the best-known consistent source, celebrated for compact stones with distinctive purplish-pink and reddish tones.
Mining at Argyle ceased in November 2020 after 37 years. Its closure did not end the existence of pink diamonds, but it removed the market's most recognisable recurring source. Important stones from other origins remain rare, and geographic origin should never be assumed from colour alone.
Colour grading
How pink diamonds are graded.
Fancy colour grading considers hue, tone and saturation. A report identifies the dominant colour, any modifying hue and the intensity grade. In pink diamonds, modifiers such as purple, orange and brown can create beautiful individual character, while the purity and evenness of the colour 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 diamond renowned for its size, saturation and clarity. Its 2017 Sotheby’s sale established one of the most famous auction records for any gemstone.
The Williamson Pink Star
A cushion-shaped natural pink diamond of exceptional saturation and internal purity, sold at Sotheby’s Hong Kong in 2022.
The Graff Pink
A rare emerald-cut pink diamond whose elegant shape and historic provenance made it one of the defining coloured-diamond sales of its era.
The Geneva Pink
A cushion modified brilliant-cut Type IIa diamond admired for its saturated purplish-pink colour, exceptional clarity and contemporary high-jewellery setting.
The Desert Rose
A remarkable pear-shaped diamond distinguished by its vivid orangy-pink hue, imposing scale and rare VVS1 clarity.
The Daria-i-Noor
One of the world’s largest historic pink diamonds, celebrated for its pale rose colour, table cut and place within the Iranian Crown Jewels.
Private sourcing & bespoke design
From rare colour to personal jewel.
A pink diamond should be considered in relation to the person who will wear it, the design and the character of the stone itself. Through a private consultation, I can help define the right hue, scale, shape and setting 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.
