Top 12 Most Expensive Diamond Rings in the World

The most expensive diamond ring in the world is more than just jewelry—it's a masterpiece of nature and human artistry. These rare gems combine breathtaking beauty with astronomical price tags, often selling for millions at auction. No matter if you're a jewelry enthusiast or just curious about luxury, the most expensive diamond rings offer a fascinating glimpse into the world of high-end gems. In this article, we’ll dig in to the top 12 most expensive diamond rings, their unique stories, and what makes them so valuable.

1. The Pink Star Diamond Ring – $71.2 Million

The Pink Star diamond ring holds the record as the most expensive diamond ring ever sold. This 59.60-carat oval-shaped fancy vivid pink diamond is a rare Type IIa gem, meaning it has no measurable impurities. The GIA graded it as the largest Internally Flawless Fancy Vivid Pink diamond in the world.

• Key details:
  1. Sold for $71.2 million at Sotheby’s Hong Kong in 2017.
  2. Originally weighed 132.5 carats before cutting.
  3. Renamed CTF Pink by buyer Chow Tai Fook.

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Learn more about the Pink Star diamond.

2. Williamson Pink Star – $57.7 Million

Cut from a 32.32-carat rough found in Tanzania, this 11.15-carat cushion-cut pink diamond set a record for the highest per-carat price at auction. Its rose gold setting features trapeze-cut diamonds for added brilliance.

• Why it’s special:
  1. Sold for $57.7 million at Sotheby’s Hong Kong.
  2. Internally flawless with vivid pink color.
  3. Only 1% of pink diamonds exceed 10 carats.

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See the Williamson Pink Star at Sotheby’s.

3. Oppenheimer Blue – $57.5 Million

This 14.62-carat rectangular blue diamond comes from South Africa’s Premier mine. Blue diamonds account for less than 0.1% of all diamonds, making this Type IIb gem extraordinarily rare.

• Fast facts:
  1. Named after mine owner Sir Phillip Oppenheimer.
  2. Sold at Christie’s Geneva for $57.5 million.
  3. Only 10% of blue diamonds exceed 1 carat.

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Read about blue diamond rarity.

4. Blue Moon of Josephine – $48.4 Million

This 12.03-carat cushion-cut blue diamond was renamed after the buyer’s daughter. Found at South Africa’s Premier mine, it set a per-carat record when sold in 2015.

• Notable features:
  1. Internally Flawless Fancy Vivid Blue.
  2. Originally named simply Blue Moon.
  3. $4 million per carat auction price.

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Discover more about the Blue Moon.

5. Graff Pink – $46 Million

Laurence Graff purchased this 24.78-carat pink diamond in 2010 after it hadn’t been seen publicly for 60 years. His cutters removed 25 inclusions to create this flawless gem.

• Why it stands out:
  1. Originally owned by Harry Winston.
  2. Recut from 24.78 to 23.88 carats.
  3. Platinum setting with shield diamonds.

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View the Graff Pink’s transformation.

6. Grace Kelly’s Cartier Ring – $44.3 Million

Prince Rainier III commissioned this 10.48-carat emerald-cut diamond ring for Grace Kelly in 1956. Its current value reflects both its royal provenance and timeless Cartier design.

• Royal details:
  1. Flanked by two baguette diamonds.
  2. Part of the Grimaldi collection.
  3. Original $4 million price now worth $44 million.

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See Grace Kelly’s iconic ring.

7. Bleu Royal – $43.8 Million

This 17.61-carat pear-shaped blue diamond spent 50 years in a private collection before its 2023 auction debut. Its vivid color and flawless clarity drove its price 25% above estimates.

• Auction highlights:
  1. Sold for $43.8 million at Christie’s.
  2. Type IIb diamond with rose gold accents.
  3. Exceeded $35 million estimate.

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Explore the Bleu Royal’s history.

8. Eternal Pink – $34.8 Million

Mined in Botswana, this 10.5-carat purplish-pink diamond impressed the GIA with its color saturation. The cushion mixed-cut gem sits between trapezoid diamonds in its setting.

• Color details:
  1. Fancy vivid purplish-pink.
  2. From a 23.78-carat rough.
  3. Sotheby’s New York sale in 2023.

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Learn about pink diamond rarity.

9. Pink Promise – $32 Million

Jeweler Stephen Silver recut this diamond from 16.21 to 14.93 carats to improve its color. The oval pink gem features a pavé diamond halo in its platinum setting.

• Recutting facts:
  1. Enhanced color grade through precision cutting.
  2. Sold at Christie’s Hong Kong in 2017.
  3. Named for its vivid pink promise.

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View the Pink Promise details.

10. Laguna Blu – $25.7 Million

Bulgari’s 11.16-carat pear-shaped blue diamond spent 50 years privately held before its 2023 auction. Priyanka Chopra Jones wore it as a necklace at the Met Gala before its sale.

• Bulgari history:
  1. Originally acquired by Giorgio Bulgari.
  2. Reset as a laurel wreath necklace.
  3. Type IIb fancy vivid blue.

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See the Laguna Blu’s transformation.

11. Cullinan Dream – $25.3 Million

Named after the Premier mine’s founder, this 24.18-carat blue diamond features a rectangular mixed cut. The sea-blue gem is accented with tapered baguettes.

• Mine connection:
  1. From South Africa’s Premier mine.
  2. Type IIb fancy intense blue.
  3. Sold at Christie’s New York in 2016.

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Read about the Cullinan legacy.

12. Infinite Blue – $25.3 Million

This 11.8-carat radiant-cut blue diamond contrasts beautifully with pink diamond accents. Despite selling below estimates, its vivid color made it a key 2023 auction highlight.

• Color details:
  1. Fancy vivid blue with VS2 clarity.
  2. Rose and white gold setting.
  3. Sold at Sotheby’s Hong Kong.

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Explore blue diamond characteristics.

Final Thoughts

The most expensive diamond ring in the world represents the pinnacle of natural beauty and human craftsmanship. From the Pink Star’s record-breaking sale to Grace Kelly’s iconic Cartier ring, these gems combine rarity, history, and unparalleled beauty. No matter if you’re a collector or simply appreciate fine jewelry, these diamonds offer a window into a world where nature’s rarest creations meet expert artistry. While most will never own such treasures, their stories continue to captivate jewelry lovers worldwide.

See Also

• How Diamonds Are Graded
• Famous Diamond Auctions
• Celebrity Engagement Rings