10 most expensive diamonds on the planet

The most expensive diamonds on the planet, some even seem priceless.

10. Archduke Joseph Diamond - $21.5 million

The Archduke Joseph Diamond was discovered in one of the oldest diamond mines in the world in the Golconda region of India.

The 76-carat (about 15.2 gram) Archduke Joseph diamond sold at Christie's Geneva Magnificent Jewels auction for $21.5 million.

9. Perfect Pink Diamond - 23 million USD

The 14.23-carat (2.846-gram) Perfect Pink diamond sold at Christie's auction house in Hong Kong for $23 million.

8. Wittelsbach-Graff Diamond - $24.3 million

The Wittelsbach-Graff diamond weighs about 31.06 carats (about 6.212 grams) and costs 24.3 million USD. This is a jewelry for the nobility and royalty.

In the 17th century, Spanish King Phillip IV chose the Wittelsbach-Graff diamond as part of his daughter's dowry.

In 2008, Laurence Graff, a British jeweler, bought the diamond, then called the Blaue Wittelsbach. Graff then hired a diamond cutter, removed all the impurities, and named it the Wittelsbach-Graff.

7. Steinmetz Pink Diamond - $25 million

Steinmetz Pink is the purest and finest pink diamond in the world,

The Steinmetz Pink was discovered in South Africa, weighs 59.60 carats (about 11.92 grams) and took a team of eight workers nearly 20 months to cut it.

6. Princie Diamond - $40 million

The Princie Diamond is famous for its rarity, classified as Fancy Intense Pink. The diamond was discovered in the ancient Golconda diamond mines in south-central India, and weighs 34.65 carats (about 6.93 grams).

5. Graff Pink Diamond - $46 million

Graff Pink reaches a weight of 24.78 carats (about 4.95 grams), is completely free of impurities, nitrogen, fluorescence,... and is classified as Type IIa.

4. De Beers Centenary Diamond - $100 million

The De Beers Centenary Diamond is a completely flawless, colorless diamond that was discovered in a mine in South Africa in 1986. In its rough form, the De Beers Centenary weighed 599 carats. In February 1991, the De Beers Centenary emerged as a heart-shaped diamond, weighing 273.85 carats.

The current owner of De Beers Centenary is a mystery.

3. Hope Diamond - $350 million

The Hope Diamond is known as the “Blue Diamond of the Crown.”

The Hope Diamond is a purplish-blue diamond that weighs 45.52 carats (about 9.104 grams) and is one of the most famous diamonds in the world.

2. Cullinan Diamond - 400 million USD

Cullinan, a pear-shaped diamond weighing a whopping 530.2 carats (106.4 grams).

The Cullinan was mined in South Africa in 1905 and was originally 3,106 carats, making it the largest rough diamond ever found. However, it was later split into 105 gems of varying cuts and weights. The largest of these, known as Cullinan I, weighed 530.20 carats.

1. Koh-I-Noor Diamond - Priceless

The Koh-I-Noor weighs 105 carats (about 21 grams) and was once considered one of the largest diamonds in the world.

According to legend, Koh-I-Noor existed before the birth of Jesus. Some experts theorize that Koh-I-Noor first appeared in the early 1300s.

After passing through various owners over the centuries, the Koh-i-Noor belonged to the British royal family in the 19th century, where it was used to adorn the crown of the late Queen Elizabeth.

Koh-i-Noor was last seen in public in 2002.

The value of this diamond is priceless because it cannot be measured or weighed.