Top 10 Most Valuable Diamonds in the World

Lola Lin

Lola Lin

April 03, 2025

5 min read

The most valuable diamond in the world is a topic that fascinates gem enthusiasts and collectors alike. These rare gems are not just symbols of wealth but also pieces of history. The most valuable diamond in the world often combines size, color, clarity, and historical significance. No matter if you're a diamond lover or just curious, this list will dig in to the top 10 most valuable diamonds in the world, each with its own unique story and price tag.

Koh-i-Noor Diamond

1. The Koh-i-Noor Diamond

The Koh-i-Noor, meaning 'Mountain of Light,' is arguably the most valuable diamond in the world. This 105.6-carat oval-cut diamond has a history steeped in royalty and controversy. Originally mined in India, it is now part of the British Crown Jewels.

  • Key facts:
    1. Weight: 105.6 carats.
    2. Color: Colorless.
    3. Current location: Tower of London.
    4. Historical significance: Believed to bring bad luck to male owners.

For more details, check out the history of the Koh-i-Noor Diamond.

Cullinan Diamond

2. The Cullinan Diamond

The Cullinan Diamond is the largest rough diamond ever found, weighing 3,106 carats. It was cut into several stones, the largest of which is the 530.2-carat Cullinan I, set in the British Sovereign’s Sceptre.

  • Key facts:
    1. Original weight: 3,106 carats.
    2. Largest cut: Cullinan I (530.2 carats).
    3. Current value: Over $400 million.
    4. Location: British Crown Jewels.

Learn more about the Cullinan Diamond.

Pink Star Diamond

3. The Pink Star Diamond

The Pink Star is the largest vivid pink diamond ever graded, weighing 59.60 carats. It sold for $71.2 million in 2017, making it one of the most valuable diamonds in the world.

  • Key facts:
    1. Weight: 59.60 carats.
    2. Color: Fancy vivid pink.
    3. Auction price: $71.2 million.
    4. Current owner: Chow Tai Fook Enterprises.

Explore the Pink Star Diamond.

Hope Diamond

4. The Hope Diamond

The Hope Diamond is a 45.52-carat fancy dark grayish-blue diamond with a storied past. It’s rumored to be cursed and is now displayed at the Smithsonian Museum.

  • Key facts:
    1. Weight: 45.52 carats.
    2. Color: Fancy dark grayish-blue.
    3. Estimated value: $250 million.
    4. Location: Smithsonian Museum.

Read more about the Hope Diamond.

Oppenheimer Blue Diamond

5. The Oppenheimer Blue Diamond

This 14.62-carat fancy vivid blue diamond sold for $57.5 million in 2016. It’s named after Sir Philip Oppenheimer, a diamond connoisseur.

  • Key facts:
    1. Weight: 14.62 carats.
    2. Color: Fancy vivid blue.
    3. Auction price: $57.5 million.
    4. Current owner: Private collector.

Discover the Oppenheimer Blue Diamond.

Graff Pink Diamond

6. The Graff Pink Diamond

This 24.78-carat fancy intense pink diamond was purchased by Laurence Graff for $46 million in 2010. It’s known for its vibrant color and flawless clarity.

  • Key facts:
    1. Weight: 24.78 carats.
    2. Color: Fancy intense pink.
    3. Auction price: $46 million.
    4. Current owner: Laurence Graff.

Find out more about the Graff Pink Diamond.

Moussaieff Red Diamond

7. The Moussaieff Red Diamond

This 5.11-carat fancy red diamond is one of the rarest in the world. Red diamonds are so scarce that their value is often immeasurable.

  • Key facts:
    1. Weight: 5.11 carats.
    2. Color: Fancy red.
    3. Estimated value: $20 million.
    4. Current owner: Private collector.

Learn about the Moussaieff Red Diamond.

Blue Moon Diamond

8. The Blue Moon Diamond

This 12.03-carat fancy vivid blue diamond sold for $48.4 million in 2015. It was renamed 'The Blue Moon of Josephine' by its new owner.

  • Key facts:
    1. Weight: 12.03 carats.
    2. Color: Fancy vivid blue.
    3. Auction price: $48.4 million.
    4. Current owner: Joseph Lau.

Explore the Blue Moon Diamond.

Regent Diamond

9. The Regent Diamond

This 140.64-carat diamond has a history of theft and recovery. It’s now displayed at the Louvre Museum in Paris.

  • Key facts:
    1. Weight: 140.64 carats.
    2. Color: White with pale blue undertones.
    3. Estimated value: $60 million.
    4. Location: Louvre Museum.

Read more about the Regent Diamond.

De Beers Centenary Diamond

10. The De Beers Centenary Diamond

This 273.85-carat diamond was unveiled in 1988. Its current owner is unknown, adding to its mystery.

  • Key facts:
    1. Weight: 273.85 carats.
    2. Color: D (colorless).
    3. Clarity: Flawless.
    4. Estimated value: $100 million.

Discover the De Beers Centenary Diamond.

Final Thoughts

The most valuable diamond in the world is a title that changes hands depending on criteria like size, color, and history. From the Koh-i-Noor to the Pink Star, these gems are more than just stones—they’re pieces of history. No matter if you're a collector or just fascinated by luxury, these diamonds offer a glimpse into a world of unparalleled beauty and value.