Top 10 World's most Expensive Diamond Ring

When we hear about diamond rings selling for millions of dollars, it is easy to assume it is only about size or sparkle. But the truth is far deeper. The value of the world’s most expensive diamond rings comes from a rare mix of geology, artistry, and history, how nature formed the stone, how precisely it was cut, and who it once belonged to.

Each of these rings tells a different story. Some are masterpieces of color formed under unique geological pressure, while others carry the legacy of royalty and collectors who preserved them for decades. Below are the 10 most expensive diamond rings in the world, each with its own story and reason for being worth millions.

1. The Pink Star

The Pink Star holds the record as the most expensive diamond ring ever sold.

It features a 59.60-carat Fancy Vivid Pink diamond, certified by the Gemological Institute of America (GIA) as Internally Flawless, meaning it has no visible inclusions even under magnification.

This rare diamond was mined by De Beers in South Africa in 1999 and later cut into an oval mixed shape after almost two years of precise craftsmanship.

It was auctioned by Sotheby’s Hong Kong in 2017 and sold for 71.2 million US dollars, purchased by Chow Tai Fook, a luxury jewellery brand.

2. The Oppenheimer Blue

The Oppenheimer Blue is one of the most famous blue diamonds in the world.

Weighing 14.62 carats, it is graded as Fancy Vivid Blue, a color extremely rare in nature. Its beauty lies in its perfect rectangular emerald cut that enhances the diamond’s depth and purity.

The diamond once belonged to Sir Philip Oppenheimer, a member of the De Beers diamond family.

It was auctioned by Christie’s Geneva in 2016 for around 50.6 million US dollars, making it one of the most valuable blue diamond rings ever sold.

3. The Graff Pink

The Graff Pink is a 24.78-carat Fancy Intense Pink diamond known for its vivid, evenly spread color and exceptional clarity.

It was previously part of a private collection before being purchased by jeweller Laurence Graff in 2010 for 46.16 million US dollars.

Graff’s experts later recut the stone slightly to improve symmetry and brilliance, creating one of the most stunning pink diamonds in existence.

Its soft rectangular cut and intense pink tone make it one of the most recognized and desired diamonds in the world.

4. The Blue Moon of Josephine

The Blue Moon of Josephine features a 12.03-carat Fancy Vivid Blue diamond, known for its pure and uniform color.

It was purchased in 2015 for about 48.4 million US dollars by Hong Kong billionaire Joseph Lau, who named it after his daughter.

The diamond’s intense blue hue comes from trace amounts of boron within its structure. It’s cut in a cushion shape, maximizing brilliance while maintaining depth in color.

5. The Winston Pink Legacy

The Winston Pink Legacy is an 18.96-carat Fancy Vivid Pink diamond once owned by the Oppenheimer family.

It was bought by Harry Winston in 2018 at a Christie’s auction for 50.4 million US dollars.

What makes this ring special is its perfectly even pink hue and rectangular cut, paired with flawless internal structure. The diamond’s color distribution and brilliance are considered among the best ever graded by GIA.

6. The Williamson Pink Star

The Williamson Pink Star is a 11.15-carat Fancy Vivid Pink diamond and one of the purest pink diamonds ever mined.

It was cut from a 32.32-carat rough diamond discovered in Tanzania and sold at auction in 2022 for 57.7 million US dollars.

This diamond’s clean structure, rare color saturation, and expert cushion cut make it one of the most valuable pink diamonds of modern times.

7. The CTF Pink Star II

Often confused with the original Pink Star, the CTF Pink Star II refers to the same diamond after being renamed by Chow Tai Fook.

Following its purchase, it became a symbol of modern Chinese luxury and record-breaking diamond craftsmanship.

Its 59.60-carat flawless pink gem continues to represent the highest value ever achieved for any diamond ring.

8. The Orange Diamond Ring

The Orange Diamond, at 14.82 carats, is the largest Fancy Vivid Orange diamond ever graded by GIA.

It was sold at Christie’s Geneva in 2013 for 35.5 million US dollars.

Orange diamonds are incredibly rare, as their color forms from nitrogen atoms combining in a unique lattice arrangement. The diamond’s elongated oval cut enhances both its fire and brilliance, making it one of the most remarkable stones ever auctioned.

9. The Pink Promise

The Pink Promise features a 14.93-carat Fancy Vivid Pink diamond, known for its remarkable purity and soft tone.

It was recut from a larger 16-carat stone to enhance its color intensity, eventually being sold for 32.4 million US dollars in 2017.

This ring is a masterclass in diamond cutting. The transformation from pale pink to vivid pink increased its value dramatically, showing how precision can define price.

10. Bleu Royal Diamond Ring

The Bleu Royal Diamond Ring is one of the most exceptional blue diamonds ever sold at auction. Featuring a 17.61-carat fancy vivid blue diamond, it stands out for its rare color intensity and flawless symmetry. Classified as a Type IIb diamond, it is internally flawless, with perfect clarity that enhances its deep ocean-like hue.

The diamond is set in a graceful combination of platinum and 18K rose gold, with two smaller colorless pear-shaped diamonds placed on either side to draw focus toward the vibrant blue center stone. The exquisite design allows the diamond’s natural brilliance to take the spotlight.

Originally part of a private collection, the Bleu Royal remained unseen for nearly 50 years before reappearing at a Christie’s auction in Geneva in November 2023, where it sold for an astonishing $43.8 million, far surpassing its pre-sale estimate of $35 million. This sale placed it among the most valuable blue diamonds ever recorded, admired for both its rarity and unmatched beauty.

Key Learnings from the World’s Rarest Rings

1. Color defines rarity. Pink and blue diamonds are valued far higher than white diamonds because of their scarcity.
   
   

2. Clarity and craftsmanship matter equally. A flawless stone can lose millions in value if poorly cut.
   
   

3. Natural origin is key. Every diamond listed is verified by GIA, ensuring authenticity and traceability.
   
   

4. Legacy adds value. Rings connected to royal families or global collectors carry historical importance that multiplies their worth.
   
   

Final Thought

The world’s most expensive diamond rings are more than symbols of wealth. They are proof of how rare nature’s beauty can be.

Each ring represents decades of mining, years of craftsmanship, and timeless artistry.

Whether it is the soft blush of a pink diamond or the deep hue of a blue one, these rings remind us that true luxury lies in perfection, patience, and rarity.