Top 5 most expensive diamonds in the world - see pics - Formed at 500 km below the Earth's crust, often over 3 billion years old diamonds are created when carbon is subjected to both huge pressure and heat.
Largest-ever purple-pink diamond sells for THIS whopping price, pics go VIRAL - Christie's said that the diamond was bought by an Asian private buyer on Sunday, but did not divulge any other details.
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