One of the Priciest Rough Diamonds Ever Fetches $40 Million
- Petra sells 39.3-carat blue diamond for $1 million a carat
- Gem sold to partnership between De Beers and trader Diacore
Petra Diamonds Ltd. sold a 39.3-carat blue gem for more than $40 million, making it one of the most expensive rough diamonds ever.
The small miner sold the exceptional Type IIb blue diamond to a joint venture between top producer De Beers and Diacore, a trading company owned by the billionaire Steinmetz family, it said Monday. The stone fetched just over $1 million per carat and is the most expensive gem Petra has ever sold.