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Top 10 Most Expensive Diamonds in the World in 2025
Diamonds have long been regarded as symbols of luxury and timeless elegance. Their rarity, exceptional craftsmanship, and historical significance make them some of the most sought-after treasures in the world. In this article, we unveil the top 10 most expensive diamonds in the world in 2025, diving deep into their unique characteristics, prices, and fascinating stories.
1. The Koh-i-Noor Diamond
The Koh-i-Noor Diamond, often referred to as the “Mountain of Light,” remains one of the most famous and debated diamonds in history. Weighing an impressive 105.6 carats, this priceless gem is housed in the British Crown Jewels. Its origins trace back to India, where it was mined centuries ago. The diamond has a rich and controversial history, having passed through the hands of numerous monarchs and empires. Although its precise monetary value cannot be determined, experts agree that it is priceless due to its unmatched historical significance and craftsmanship.
2. The Cullinan Diamond
The Cullinan Diamond holds the distinction of being the largest gem-quality rough diamond ever discovered. Found in South Africa in 1905, this remarkable diamond originally weighed a staggering 3,106 carats. The Cullinan Diamond was later cut into nine major stones and numerous smaller ones, with the largest, the Cullinan I (or Great Star of Africa), weighing 530.4 carats. Today, these diamonds are part of the British Crown Jewels, making them invaluable in both monetary and historical terms. Experts estimate the Cullinan I alone is worth over $400 million.
3. The Hope Diamond
Known for its mesmerizing deep-blue hue, the Hope Diamond is one of the most famous diamonds in the world. Weighing 45.52 carats, this diamond is believed to have originated in the Kollur Mine in India. It carries a fascinating reputation, often associated with tales of a curse due to the untimely misfortunes of its previous owners. Currently housed at the Smithsonian Institution in Washington, D.C., the Hope Diamond is estimated to be worth $350 million, making it a true marvel in the diamond world.
4. The Pink Star Diamond
The Pink Star Diamond, a flawless fancy vivid pink diamond, holds the record for the most expensive diamond ever sold at auction. Weighing 59.6 carats, this exquisite gem was mined by De Beers in Africa. It was sold for an astounding $71.2 million at a Sotheby’s auction in 2017. With its exceptional clarity, size, and color, the Pink Star Diamond continues to captivate the world as one of the most valuable gemstones in existence.
5. The Oppenheimer Blue Diamond
The Oppenheimer Blue Diamond is a legendary fancy vivid blue diamond weighing 14.62 carats. It is named after its previous owner, Sir Philip Oppenheimer, who was part of the De Beers mining company. This diamond fetched $57.5 million at a Christie’s auction in 2016, making it one of the most expensive diamonds ever sold. Its rarity and stunning color make it a highly coveted piece among collectors and connoisseurs.
6. The Regent Diamond
The Regent Diamond, discovered in India in the early 18th century, is celebrated for its exceptional brilliance and clarity. Weighing 140.64 carats, this diamond has adorned the crowns of French royalty, including Napoleon Bonaparte. It is currently displayed at the Louvre Museum in Paris, where it remains a symbol of opulence and regal history. The Regent Diamond is valued at $61 million, reflecting its unparalleled beauty and historical significance.
7. The Wittelsbach-Graff Diamond
The Wittelsbach-Graff Diamond, a 31.06-carat fancy deep blue diamond, has a storied history that dates back to the 17th century. Originally part of the Austrian and Bavarian crown jewels, this diamond was recut in 2010 by Laurence Graff to enhance its clarity and brilliance. The diamond’s value is estimated at $80 million, making it one of the most extraordinary blue diamonds in the world.
8. The De Beers Millennium Star
The De Beers Millennium Star is a flawless pear-shaped diamond weighing 203.04 carats. Discovered in the Democratic Republic of Congo, this diamond is considered one of the finest in the world due to its exceptional clarity and size. With an estimated value of $200 million, the De Beers Millennium Star holds a special place in the diamond industry.
9. The Graff Pink Diamond
The Graff Pink Diamond, a 24.78-carat fancy intense pink diamond, became one of the most expensive diamonds ever sold when it fetched $46 million at a Sotheby’s auction in 2010. Its exceptional hue and flawless craftsmanship make it a truly unique and valuable gem. Owned by Laurence Graff, this diamond has become a symbol of rarity and elegance.
10. The Blue Moon Diamond
The Blue Moon Diamond, a 12.03-carat fancy vivid blue diamond, made headlines when it sold for $48.4 million at Sotheby’s in 2015. Its breathtaking color and perfect symmetry make it one of the most extraordinary diamonds in the world. This diamond, renamed “The Blue Moon of Josephine” by its buyer, continues to captivate diamond enthusiasts and collectors alike.