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.

Jewelry can really pull an outfit together, but is it worth millions? Some say so. Since jewelry can appreciate in price, ...

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 ...

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 ...