Introduction
Diamonds symbolize wealth, power, and eternal beauty, captivating collectors and royalty for centuries. In 2025, the world’s most expensive diamonds continue to break records at auctions, blending rarity, history, and craftsmanship. From the legendary Koh-I-Noor to the record-breaking Pink Star, this list unveils the 20 most expensive diamonds in the world, showcasing their unparalleled value and allure. Dive into the ultimate luxury of nature’s finest creations.
What Makes a Diamond Expensive?
A diamond’s value hinges on the 4 Cs: carat weight, color, clarity, and cut. Rare colors like blue, pink, or red, along with historical significance, skyrocket prices. In 2025, demand for colored diamonds and sustainable sourcing further drives value, with auctions seeing fierce competition among the elite.
The 20 Most Expensive Diamonds in 2025
1. Koh-I-Noor
The Koh-I-Noor, meaning “Mountain of Light,” is a 105.6-carat oval-cut colorless diamond from India’s Golconda mines. Part of the British Crown Jewels, its history spans centuries, though ownership remains controversial. Considered priceless, its value is often cited as immeasurable due to its cultural significance.
2. Cullinan Diamond
Mined in South Africa in 1905, the Cullinan originally weighed 3,106 carats—the largest rough diamond ever found. Cut into 105 gems, Cullinan I (530.2 carats) adorns the British Sovereign’s Sceptre. Estimated at $400 million, its royal legacy cements its rank.
3. Pink Star (CTF Pink Star)
This 59.60-carat fancy vivid pink diamond sold for $71.2 million at Sotheby’s in 2017. Mined by De Beers in 1999, it’s the largest of its kind, internally flawless, and renamed by Chow Tai Fook. Its value in 2025 is estimated at $75 million due to market trends.
4. Oppenheimer Blue
A 14.62-carat fancy vivid blue diamond, the Oppenheimer Blue fetched $57.5 million at Christie’s Geneva in 2016. Named after Sir Philip Oppenheimer, its rarity as a Type IIb blue diamond pushes its 2025 estimated value to $60 million.
5. Williamson Pink Star
This 11.15-carat fancy vivid pink diamond sold for $57.7 million at Sotheby’s Hong Kong in 2022. Cut from a 32.32-carat rough from Tanzania, its flawless clarity makes it a gem. Its 2025 value is estimated at $59 million.
6. Lesedi La Rona
A 1,109-carat rough diamond from Botswana, sold for $53 million in 2016, was cut into a 302.37-carat emerald-cut gem by Graff Diamonds. The largest of its kind, its 2025 value is estimated at $55 million.
7. Graff Pink
This 24.78-carat fancy intense pink diamond sold for $46.1 million at Sotheby’s Geneva in 2010. Purchased by Laurence Graff, its vivid hue and emerald cut make it iconic. Its 2025 value is estimated at $50 million.
8. Bleu Royal
A 17.61-carat fancy vivid blue diamond sold for $44 million at Christie’s Geneva in 2023. The largest vivid blue ever auctioned, its 2025 value is estimated at $48 million due to rising demand for blue diamonds.
9. Apollo Blue
One half of a pair of earrings, this 14.54-carat fancy vivid blue diamond sold for $42 million at Sotheby’s Geneva in 2017. Its 2025 value is estimated at $45 million, reflecting the rarity of blue gems.
10. Princie Diamond
A 34.65-carat fancy intense pink diamond, sold for $39.3 million at Christie’s New York in 2013, has ties to Indian royalty. Its 2025 value is estimated at $43 million.
11. Eternal Pink
This 10.57-carat fancy vivid purplish-pink diamond fetched $34.8 million at Sotheby’s New York in 2023. Mined in Botswana, its 2025 value is estimated at $38 million.
12. Orange Diamond
A 14.82-carat fancy vivid orange diamond sold for $35.5 million at Christie’s Geneva in 2013, setting a per-carat record. Its rarity pushes its 2025 value to $37 million.
13. Sakura Diamond
Named after cherry blossoms, this 15.81-carat fancy vivid purple-pink diamond sold for $29.3 million in 2021. Mined in Russia, its 2025 value is estimated at $32 million.
14. Infinite Blue
An 11.28-carat fancy vivid blue diamond, sold for $25.3 million at Sotheby’s Hong Kong in 2023, reflects the allure of blue gems. Its 2025 value is $28 million.
15. Winston Blue
This 13.22-carat fancy vivid blue diamond sold for $23.8 million at Christie’s Geneva in 2014. Renamed by Harry Winston, its 2025 value is $26 million.
16. Perfect Pink
A 14.23-carat fancy intense pink diamond sold for $23.2 million at Christie’s Hong Kong in 2010. Its 2025 value is estimated at $25 million.
17. Archduke Joseph
A 76.45-carat colorless diamond sold for $21.5 million at Christie’s Geneva in 2012. With historical ties to Austrian royalty, its 2025 value is $24 million.
18. Moussaieff Red
This 5.11-carat fancy red diamond, one of the rarest colors, is valued at $20 million. Discovered in Brazil, its price reflects its scarcity in 2025.
19. Heart of Eternity
A 27.64-carat fancy vivid blue heart-shaped diamond from South Africa, valued at $16 million in recent years, holds steady in 2025 due to its rarity.
20. Allnatt Diamond
This 101.29-carat fancy vivid yellow diamond, named after its first owner, is valued at $12 million in 2025. Its VS2 clarity and vibrant hue make it a standout.
2025 Trends in Diamond Markets
- Colored Diamonds Surge: Pink and blue diamonds dominate auctions, with prices rising 5-10% annually.
- Sustainable Sourcing: Buyers prioritize ethically mined gems, boosting value for brands like De Beers.
- Investment Appeal: Diamonds are seen as safe-haven assets, per a 2025 Luxury Market Report.
Why These Diamonds Matter
These gems aren’t just stones—they’re history, art, and status symbols. In 2025, they reflect a growing appetite for rarity and legacy, with collectors willing to pay millions for a piece of eternity.
Conclusion
The 20 most expensive diamonds of 2025, from the priceless Koh-I-Noor to the vibrant Pink Star, embody luxury at its finest. Their stories of royalty, rarity, and record-breaking sales captivate the world. Explore more luxury treasures at Rocketwala.online to fuel your passion for the extraordinary!
