The world's costliest gem used in jewellery is considered to be the Pink Diamond. Here is the list of the world's top five costliest gems.

Only billioniare's can afford this: Shocking price of world's costliest gems

A “fancy vivid pink” diamond has set a new world record after being sold for 453 million Hong Kong dollars ($57 million), more than double its estimated price. This is now the highest price per carat for a diamond sold at auction.

Williamson Pink Star diamond sells for record $57m in Hong Kong auction

The 59.60-carat diamond is the largest in its class ever graded by the Gemological Institute of America

'Pink Star' diamond fetches record $71.2 million in auction

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pink star-diamond

Only billioniare's can afford this: Shocking price of world's costliest gems

Williamson Pink Star diamond sells for record $57m in Hong Kong auction

'Pink Star' diamond fetches record $71.2 million in auction