Business Insider2y
Why pearls, black opal, and chocolate diamonds are so expensive
In the '80s and '90s, gem-quality brown diamonds were worth about $1,500 per carat, but now many sell for up to $10,000 per carat. And the price of larger stones has risen by as much as 25 times.
Business Insider India5y
Chocolate diamonds weren't always valuable. Here's how they went from cheap rocks to adorning Rihanna's $130,000 Grammys necklace.
Google searches for "Chocolate Diamond" went from virtually zero in 2007 to 400,000 in 2014. And the more popular they became, the more value they earned. Eddie LeVian: The price of Chocolate ...
BBC1y
'Big Ugly Diamond' discovered by Arkansas state park visitor
"That's for 'Big, Ugly Diamond,'" said David Anderson, a lucky tourist from Murfreesboro, Tennessee. Anderson found the 3.29-carat brown diamond on 4 March at Crater of Diamonds State Park.