Set in a Tiffany & Co. necklace, it sold for $4.2 million, the highest price and price per carat paid for a Paraíba tourmaline at auction.
De Beers: Sentiment Is Positive Following Vegas Shows
The diamond miner and marketer sold $575 million in rough in the fifth sales cycle of 2018, up from $541 million last year.

New York--De Beers Group reported positive sentiment in the midstream sector of the diamond market following the jewelry trade shows in Las Vegas, and saw revenue from its most recent cycle of sales rise 6 percent year-over-year.
In the fifth sales cycle of the year, De Beers reported that rough diamond sales totaled $575 million, compared with $541 million in the same period last year. (The figure given for the fifth sales cycle is provisional; De Beers will provide a final number when it reports results for the sixth cycle.)
De Beers also revised its figure for the fourth sales cycle upward, from $550 million to $554 million.
The company’s revenue figures include sales made to both sightholders and on its online auction platform.
CEO Bruce Cleaver said De Beers continues to see strong demand for rough diamonds across its product range.
Here is a chart showing the year-over-year comparison for De Beers’ rough diamond sales in 2018.
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