So what changed? Why are Chocolate Diamonds so expensive? Diamonds get their color by how they're formed, whether it was a different element that got pulled into the carbon structure. Like boron ...

The Oppenheimer Blue sold on Wednesday for more than $57.5 million including fees at a Christie's auction in Geneva, making it the most expensive diamond ever sold.

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 ...