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De Beers is sitting on a $2 billion pile of diamonds as demand slumps — ‘It’s been a bad year’
"It’s been a bad year for rough diamond sales." Waning demand for natural diamonds has helped lift De Beers's inventory to $2 billion, the most since ... for less expensive lab-grown diamonds ...
Wall Street Journal2y
World's Most Expensive Diamond Makes $57.5 Million
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.
Business Insider3y
Why pearls, black opal, and chocolate diamonds are so expensive
Meline: A pearl is one of the most complex ... can be extremely expensive, between $100,000 and $150,000, but there's no guarantee that miners will find black opal. Once rough opal is extracted ...