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A photo of Kimberlite by James St. John –

The most expensive diamonds in the world

Diamond is a solid form of the element carbon. Diamond atoms are arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon, but diamond converts to it extremely slowly.

Diamond has the highest hardness and thermal conductivity of any natural material. Therefore, diamond is used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.

Most natural diamonds have ages between 1 billion and 3.5 billion years. Diamond is the hardest known natural material on both the Vickers scale and the Mohs scale. In the article are the most expensive diamonds in the world

1. Kohinoor

A photo of Kihinoor Diamond by

Kihinoor is one of the largest cut diamonds in the world. It weighs 105.6 carats. It is part of the British Crown Jewels. The diamond is currently set in the Crown of the Queen Mother. According to possibilities, it’s believed that the diamond was mined in Kollur Mine, India, during the period of the Kakatiya dynasty.

The history of the diamond involves a great deal of fighting between men. So, the Kohinoor acquired a reputation within the British royal family for bringing bad luck to any man who wears it. Since arriving in the UK, it has only been worn by female members of the family.

Today, the diamond is on public display in the Jewel House at the Tower of London. The governments of India, Pakistan, Iran, and Afghanistan have all claimed ownership of the Kohinoor.

India demands the return of the diamond since it attained independence from the UK in 1947. However, the UK holds onto it with the claim that they legally acquired it. Kohinoor is the most expensive diamond in the world. It is priceless!

2. The Cullinan Diamond

A photo of Cullinan Diamond and some of its cuts by

The Cullinan Diamond is the largest gem-quality rough diamond ever found. It weighs 3,106.75 carats. Cullinan diamond was discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905.

The diamond was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on sale in London, but despite considerable interest, it was still unsold after two years.

In 1907, the Transvaal Colony government bought the Cullinan and Prime Minister Louis Botha presented it to Edward VII, King of the United Kingdom. Joseph Asscher & Co. in Amsterdam cut the diamond with the command of Edward VII. It is the second most expensive diamond in the world with a value of $400 million.

3. The Hope Diamond

A photo of Hope Diamond by Mbalotia –

The Hope Diamond is a 45.52-carat diamond originally extracted in the 17th century from the Kollur Mine in Guntur, India. It is blue due to trace amounts of boron. Its exceptional size has revealed new information about the formation of diamonds. The diamond has had several owners.

The stone is known as one of the Golconda diamonds. The stone was cut and renamed the French Blue. The earliest records of the diamond show that in 1666 as the Tavernier Blue the stone was bought by French gem merchant Jean-Baptiste Tavernier.

King Louis XIV of France bought the stone from Tavernierin 1668. It was stolen in 1792 and re-cut, with the largest section of the diamond appearing under the Hope name in an 1839 gem catalog from the Hope banking family. The diamond costs $250 million.

4. Centenary Diamond

The De Beers Centenary Diamond is, at 273.85 carats. It is the third-largest diamond to have been produced in the Premier Mine. Only the Cullinan I and II are larger than the Centenary diamond among top color diamonds.

The Centenary Diamond is rated in color as grade D color by the Gemological Institute of America, which is the highest grade of a colorless diamond. The diamond is internally and externally flawless.

It was named the Centenary Diamond as it was presented in the rough for the Centennial Celebration of De Beers Consolidated Mines on 11 May 1988. The Centenary Diamond was unveiled in final form in May 1991. The diamond costs $100 million.

5. The Pink Star

The Pink Star was formerly known as the Steinmetz Pink. The diamond weighs 59.60 carats. It is rated in color as Fancy Vivid Pink by the Gemological Institute of America. The Pink Star was mined by De Beers in 1999 in South Africa.

The Pink Star is the largest known diamond having been rated Vivid Pink. As a result of this exceptional rarity, the Beny Steinmetz Group called Steinmetz Diamonds took a cautious 20 months to cut the Pink. It was unveiled in Monaco on 29 May 2003 in a public ceremony. It costs $71.2 million

6. The Regent Diamond 

A photo of Regent Diamond by Ahnode –

The Regent Diamond is 140.64-carat. The diamond is owned by the French state. As of 2015, the diamond was worth £48,000,000 in the Louvre. currently, the diamond is worth $61 million.

7. The Oppenheimer Blue Diamond

The Oppenheimer Blue is a 14.62-carat vivid blue diamond. The diamond was named for its previous owner Philip Oppenheimer. May 2016 It became the most expensive jewel ever sold at auction in May 2016. In April 2017 when it was surpassed by the Pink Star diamond.

It is cut into a rectangle. The Oppenheimer Blue is the largest fancy vivid blue diamond classified by the Gemological Institute of America ever sold at auction; it sold at Christie’s in Geneva in May 2016 for US$50.6 million. Currently, its total cost is $57.5 million.

8. The Graff Lesedi La Rona

Lesedi La Rona was formerly known in media as Karowe AK6 or as Quad 1 by the personnel at the mine. It is the fourth-largest diamond ever found, and the third-largest gem quality. It was found in the Karowe mine, in Botswana on 16 November 2015.

British jeweler Graff bought the rough diamond for $53 million in 2017. By April 2019, Graff had cut it into one large emerald cut diamond, the Graff Lesedi La Rona, weighing 302.37 carats. It is worth $53 million.

9. The Winston Pink Legacy

The Pink Legacy is a pink diamond that was purchased by Harry Winston, Inc. in 2018. It was renamed Winston Pink Legacy by CEO Nayla Hayek. The diamond was sold at a Christie’s auction for 50.375 million Swiss francs ($50m), and at $2.6 million per carat it set a world record at the time of its sale for a pink diamond.

Winston Pink Legacy was mined in South Africa around 1918. The diamond was once owned by the Oppenheimer family, who ran De Beers. It has a cut-cornered rectangular cut and has likely not been altered since it was first cut in 1920. It is mounted in a platinum ring.

10. The Blue Moon of Josephine Diamond

The Blue Moon of Josephine is a 12.03 carats blue diamond. It is described as flawless by experts. It was discovered in South Africa in January 2014 and was sold at a Sotheby’s auction in Geneva in November 2015 at a record-setting price of $48.4 million.

The diamond is the largest cushion-shaped blue stone classified as “fancy vivid” ever to appear at auction. The Blue Moon of Josephine Diamond is the world’s most expensive diamond, regardless of color.

Of course, the chain of diamonds according to their price is very long. There are other diamonds like; The Graff Pink Diamond: $46.2 million, Lesotho Legend: $40 million, The Prince Diamond: $39.3 million, The Orange Diamond: $35.5 million, and The Sakura Diamond: $29.3 million.