Top 10 Most Expensive Diamonds in History

Let’s take a look at the 10 most expensive diamonds in the world:

10. The Allnatt Diamond : $ 3+ Million

This stone is named after Major Alfred Ernest Allnatt, as he was one of the original owners of the diamond. The Allnatt diamond is 101.29 carats in a cushion cut. The diamond color is rated as fancy vivid yellow by the Gemological Institute of America. No one knows exactly where the diamond was discovered, but some experts say that the diamond was found where the De Beers Premier mine is now located.


most expensive diamond the allnatt diamond

The Allnatt Diamond


9. The Moussaieff Red Diamond : $20+ Million

The Moussaieff Red is a 5.11 carat triangular brilliant cut stone. Graded as fancy red in color by the Gemological Institute of America (GIA). Although the Moussaieff is relatively small compared to other expensive diamonds on the list, this is the largest fancy red ever graded by GIA, and red is the rarest of all natural diamond colors. It’s not known exactly how red diamonds are produced in the earth, however, it is believed that plastic deformation of the stone’s crystal is the cause. As diamonds were pushed up kimberlite pipes from deep inside the earth toward the surface they can be exposed to tremendous heat and pressure, causing areas of deformation in the crystal structure thereby changing it so that it can absorbs light in different areas of the visible spectrum. Instead of a rainbow you get a single color, often pink, purple or red. This is different from other colored diamonds such as blue, which form because of the addition of boron or green diamonds which are impacted by natural radiation. There are only around 60 natural red diamonds to have ever been discovered and just three over five carats: the Moussaieff red, the Kazanjian red and the De Young red.


most expensive diamond The Moussaieff Red diamond

The Moussaieff Red diamond


8. The Heart of Eternity : $20+ Million

The Heart of Eternity is a 27.64 carat diamond with a color rated as fancy vivid blue by the Gemological Institue of America. This diamond is a very rare class of colored diamond, type IIb, which accounts for less than 0.1% of all colored diamonds. It was cut by the Steinmetz group before sold to De Beers Group and was discovered in the Premier diamond mine of South Africa.


most expensive diamond the heart of etenity diamond

The Heart of Eternity diamond


7. Wittelsbach Diamond (Wittelsbach-Graff) : $80 Million

The Wittelsbach diamond (Wittelsbach-Graph) is a 35.36 carat blue diamond with size of 40 mm in diameter and 8.29 mm in depth with VS 2 in clarity. It has been part of both Austrian and Bavarian crown jewels, with color and clarity comparable to the Hope Diamond (you can see below on No. 4). Laurence Graff purchased the Wittelsbach Diamond in 2008 and re named the stone the Wittelsbach-Graff Diamond.


most expensive diamond wittelsbach diamond

Wittelsbach diamond


6. The Pink Star: $83.2 Million

The Pink Star, formerly known as the Steinmetz Pink diamond is 59.60 carats and is rated as Vivid Pink by the Gemological Institute of America. It’s the largest known diamond given a color as fancy vivid pink. The Pink Star or Steinmitz Pink has been displayed as part of Smithsonian’s “The Splendor of Diamons” exhibition and is now privately owned.


most expensive diamond the steinmetz pink diamond

The Pink Star or Steinmetz Pink Diamond

5. De Beers Centenary Diamond: $ 100 Million

The De Beers Centenary Diamond was classified as D in color by the Gemological Institute of America. It’s the highest color grade a colorless diamond can attain and also the clarity was deemed flawless, also the best grade. The diamond itself is 273.85 carats in weight. This diamond is the 3rd largest diamond that has been produced by the De Beer’s Premier Mine.


most expensive diamond debeers centenary diamond

De Beers Centenary Diamond


4. The Hope Diamond : $350 Million

The hope diamond is 45.52 carats and described as being fancy dark greyish-blue. The diamond is currently located in the Smithsonian Museum of Natural History in Washington DC. The stone looks blue in color to the naked eye because the of traces of boron in the crystal structure but also exhibits an unusually intense and strongly colored type of luminescence: after exposure to short-wave ultraviolet light, the diamond produces a brilliant red phosphorescence (‘glow-in-the-dark’ effect) that persists for some time after the light source has been turned off, and this strange quality may have helped fuel “its reputation of being cursed.


most expensive diamond the hope diamond

The Hope Diamond


3. The Cullinan : $2 Billion

The Cullinan Diamond at 3106.75 carats is the largest rough gem quality diamond ever found in the history of the world. After polished it became the Cullinan I or The Star of Africa at 530.2 carats, the largest diamond in the world until 1985 when The Golden Jubilee at 545.67 carats was discovered from the very same mine.


most expensive diamond the cullinan diamond

The Cullinan Diamond


2. The Sancy Diamond : Priceless

The Sancy diamond is 55.23 carats and pale yellow color. Once famous for belonging to one of the Mughals of antiquity , it’s believed that the diamond is of Indian origin. This is one of the first large diamonds to be cut with symmetrical facets. The stone is also unusual because it has no pavilion – just a pair of crowns, one on top of the other. This historical diamond is now kept in the French Crown Jewel collection housed at the Louvre.


most expensive diamond the sancy diamond

The Sancy Diamond


1. Koh-I-Noor : Priceless

Koh-I-Noor means  “Mountain of Light” in Persian. This 105.6 carat diamond was once the largest known diamond in the world. The Koh-I-Noor was discovered at the Golconda mine in the Andhra Pradesh State of India. It was owned by various Sikh, Mughal and Persian rulers that fought each other at one time or another. The stone was found to measure 36.00 × 31.90 × 13.04 mm and the gem remains the property of the British Crown, kept in The Tower of London and remaining a very popular tourist attraction to this day.


most expensive diamond Koh-I-Noor diamond

Koh-I-Noor diamond

Author: Shawn

Indiana University Alumni GIA Graduate Gemologist Student

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