A rare Russian pink diamond called the ‘ Spirit of the Rose ’ has set the new world record for the most expensive purple-pink diamond ever sold. The 14.83 carat diamond was auctioned for a ...

They are extremely rare. For every 10,000 colourless and near-colourless ... causing it to look red or, more often, pink. Purple diamonds exist but are almost never found because one stone must be ...

Previously, the hardest diamonds were found only in impact craters, making them very rare and small. The first ultra-hard diamond was found in the Canyon Diablo meteorite in Arizona in 1967.