Independent media since 2014
by Charlotte Wannebroucq · CNE Accredited Gemmologist

DIAMANT ROSE

Increasingly sought after by collectors, colored diamonds are rare, even more so for pink and red ones.
Charlotte Wannebroucq, CNE-certified expert gemmologist
Founder and Editor-in-Chief
Updated on September 16
Updated on 16 September 2026
IMG_6581 2

Rose diamond from exceptional stones.

First of all, diamonds are a fabulous and mythical stone. Therefore, pink diamonds are among the rarest and most sought-after precious stones in the jewelry world. Their unique color and rarity make them coveted objects for collectors and lovers of beautiful jewelry.

Platinum brooch set with diamonds from the 1930s © Esprit Joaillerie
Platinum brooch set with diamonds from the 1930s © Esprit Joaillerie

First of all, the carbon that makes up diamond is a common chemical element on Earth. So, how can black and common carbon turn into diamond? How is it possible that a simple graphite crayon mine has the same chemical formula as diamond?
In fact, it is heat and intense pressure that creates diamonds. This is what happened at the time of the creation of the Earth. It should be noted that the almost perfect arrangement of the carbon atoms in the diamond is composed each time of 4 bonds, thus forming a very solid 3D network. There are only 3 in the case of graphite, which has a flat sheet system network. Moreover, indestructible, impenetrable to acids, diamonds have long been called in Greek Adamas, the indestructible.
However, it breaks easily along a cleavage axis. This is due to small gaps left between the bond links. In a way, it’s a forgetfulness of nature.

Platinum Necklace with 3 rows of Navette Diamonds © Esprit Joaillerie
Platinum Necklace with 3 rows of Navette Diamonds © Esprit Joaillerie

When we talk about diamonds, we often think of white diamonds, but there are also colored diamonds: blue, green, yellow, red or pink.

Diamond Poire, Fancy Vivid Purple-Pink, 8.41 carats, Internally Flawless Credit Sotheby's
Diamond Poire, Fancy Vivid Purple-Pink, 8.41 carats, Internally Flawless
© Sotheby’s

In this regard, the sale of the already famous Vivid Pink diamond from October 7 at Sotheby’s Hong Kong gives me the opportunity to talk about colored diamonds, more specifically the Rose color.
It should be noted that this exceptional stone, with its weight and color, reached an incredible price of 17,768,041$! It comes from a mine in South Africa, operated by the De Beers holding company.

Diamond ring "Fancy Vivid Pink", diamonds, platinum. Credit Sotheby's
Diamond ring «Fancy Vivid Pink», Diamonds, Platinum.
© Sotheby’s

Increasingly sought after by collectors, colored diamonds are rare, even more so for pink and red. In fact, it is commonly said that the most beautiful pink and red diamonds come from the Argyle mine in Australia. In other words, this mine is the world’s leading producer of pink diamonds. It produces more than 90% of the world’s production.

Pink diamonds Credit Argyle Mine
Diamonds Roses
© Rio Tinto Diamonds

It belongs to the Rio Tinto group, located in the Kimberley region, in the north of Australia.
It should not be forgotten that it is necessary to extract 1 million carats of rough diamonds to obtain only 1 carat for sale. The most important aspect is that these diamonds are of very high quality.

Lamproite ore Credit Mine of Argyle
Minerai de Lamproite host to the Pink Diamonds 
© Rio Tinto Diamonds
Brilliant Diamonds Credit Mine of Argyle
Brutal Diamonds
© Rio Tinto Diamonds

Moreover, the prices are 50 times higher than the price of a white diamond.
Furthermore, the pink color is due to tensions in the crystalline structure, called “graining” in gemology. This means parallel lamellae between each other in the matrix, as well as the presence of hydrogen atoms that give the pink color. Surprisingly, this color still does not reveal all its secrets.

Rose Diamond "Toki", emerald cut, 1.59 carat, Fancy Intense Purplish Pink Production 2014 Credit Argyle Mine
Diamond Rose «Toki», Emerald Size, 1.59 carat, Fancy Intense Purplish Pink
Production 2014
© Rio Tinto Diamonds

However, an Arbogine legend gives another explanation.
The pink diamonds were created on a day when 3 women tried to catch a fish called «Barramundi”. But it was too fast and escaped and landed at the mine site. Thus, the native people believe that the pink diamonds are the heart of this fish.

Diamant Rouge Production Credit mine of Argyle
Red Diamond
2014 Collection
© Rio Tinto Diamonds

The most important appointment regarding pink diamonds is undoubtedly the emblematic Diamonds Tender Rose Argyle The annual Rio Tinto event. It is the best of the year’s production of red and pink diamonds. This rare moment takes place in Hong Kong at the end of September, it is the final stage of a worldwide tour.

Moreover, it is his General Manager, Jean-Marc Lieberherr, who speaks best about it.
«It’s fantastic to be in Hong Kong and to see the excitement around the «Trend of the Year» collection. The rarity, beauty, craftsmanship, and very special location are a powerful combination for collectors and jewelry connoisseurs alike.».

Argyle Cardinal diamond "Radian Collection 2014" Credit mine Argyle
Diamond «Argyle Cardinal»
Size Radian 1.21 carat
2014 Collection
© Rio Tinto Diamonds

It is worth noting that in this collection there are 4 red diamonds, including the «Argyle Cardinal» which is a spectacular diamond, with a radiant 1.21 carat. And the «Argyle Toki» is an intense, purplish pink fancy diamond, with a 1.59 carat emerald cut. It is named so after the «Toki», a rare Japanese bird that has a delicate pink feather under its wings (pictured above).

4 Fancy Red Diamonds Including "Argyle Cardinal" 1.21 ct, Size Radian Production 2014 Credit Argyle Mine
4 Fancy Red Diamonds including «Argyle Cardinal»
Production 2014
© Rio Tinto Diamonds

To sum up, what would stones be without color and nuances? Ultimately, pink diamonds remain fascinating, coveted, and mysterious precious stones.

My thanks to Sotheby’s Presse France

My thanks go to Argyle Mine, Rio Tinto Diamonds, thanks go to Sylvia Chapman

 

 

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Charlotte Wannebroucq, CNE-certified expert gemmologist
The author

Charlotte Wannebroucq

Gemmologist expert, member of the CNE-Art, and expert in signed jewelry. Twenty-five years of experience at the heart of Parisian jewelry, between the Carré Rive Gauche and Place Vendôme.
She signs the decryptions of collections, the analyses of stones and the estimates published in Esprit Joaillerie. Each piece commented on is examined in person, in the workshop, in the sales room or in the showroom.
  • Expertise

    Gemmology and signed jewellery

  • Member

    CNE-Art

  • Experience

    Over 25 years in Parisian jewellery