The top ten most expensive diamonds in the world are as follows:

1 The Koh-i-Noor is a diamond so expensive that it does not have a price tag. Thought to be worth around £1Billion it is the property of the British Crown. It is a flawless 105.6 carat white diamond whose name means ‘Mountain of Light’ in Persian.

2. The Sancy is another diamond so rare that it is priceless. It is contained within the French Crown Jewel collection.  It is a pale yellow 55.23 carat diamond shaped like a shield.

3 The Cullinan is the largest rough gem quality diamond ever found. Polished it is still 530.2 carats. It is worth 337 million Euros and has been dubbed the ~Great Star of Africa.”

4 The Hope Diamond is a blue diamond weighing 45.52 carats and worth 250 million Euros. It is currently stored at the Smithsonian Institute in Washington DC.

5 The de Beers centenary diamond weighs 273.85 carats and is worth 84.2 million Euros. It is a class D colourless diamond meaning it is internally and externally flawless.

6 Wittelsbach Graff is a blue diamond weighing 35.56 carats. In 2011 it was sold to the emir of Qatar, Sheikh Hamad bin Chalifa, for 67,4 million euros.

7 Pink Star formally known as the Steinmetz pink weighs 59.60 carats and is the largest pink diamond ever found. It is worth 60.7 million Euros.

8 Graff Vivid Pink is a 24.78 carat rectangular diamond. Laurence Graff bought the diamond for 38.7 million Euros. It has been placed into a ring.

9. The Princie is a 35.54 carat pink diamond discovered in India 300 years ago. It was bought from the Hyderabad Royal family in 1960 by jewellers Van Cleef & Arpels, who named it the Princie after the son of Sita Devi, the Maharanee of Baroda, an extravagant and famous socialite living in Paris. It is worth 33 million Euros.

10 The Orange is a 14.82 carat bright orange diamond which sold for 32 million Euros in 2013. Normally pink and blue diamonds are the most sought after but this orange diamond is a rare beauty.