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Petra Diamonds
Petra Recovers 20ct. Blue Diamond
Petra Diamonds has unearthed a blue diamond weighing 20.08 carats atits Cullinan mine in South Africa, it said Monday. The type IIb stone comes from the same mine that producedthe 3,106-carat Cullinan diamond...
Mining Sep 24, 2019 Rapaport News
Hope diamond
GIA Reveals Why Diamonds Are Blue
Blue diamonds may get their color from traces of boroncontained in the floors of ancient oceans, according to research by theGemological Institute of America (GIA). The research lab studied mineral inclusions in 46 blue diamondssubmitted to the GIA for...
Technology Aug 02, 2018 Rapaport News
Farnese Blue
Storied Blue Diamond Sells for $7M at Sotheby’s
The historic Farnese Blue diamond smashedits pre-sale estimate at Sotheby’s auction in Geneva on Tuesday. The 6.16-carat, pear-shaped, fancy dark grey-blue, SI1-clarity diamond,which Queen Elisabeth Farnese of Spain received on her wedding day, passedthrough four...
Polished Markets May 16, 2018 Rapaport News
Christies 150
Blue Diamond Tops Christie’s New York
A 3.09-carat blue diamond smashed its pre-sale estimate atChristie’s Magnificent Jewels auction in New York last week. Therectangular-cut, fancy intense blue diamond ring, surrounded by taperedbaguette-cut diamonds on either side, sold for $5.4 million....
Retail Apr 24, 2018 Rapaport News
Sotheby's Hong Kong blue diamond April 2018
Top Jewels Fail to Sell at Sotheby’s Auction
A blue diamond ring and a jadeite bracelet both failed tofind buyers at Sotheby’s Hong Kong sale.Most notable of the unsold lots from the April 3 auction was a14.18-carat, fancy blue, VVS2-clarity diamond ring, surrounded...
Retail Apr 08, 2018 Rapaport News
Sothebey's Farnese Blue
Royal Blue Diamond Surfaces After 300 Years
Sotheby’s will offer the historic Farnese Blue diamond atits Geneva sale in May, the first time it has been on the market. The pear-shaped, 6.16-carat, fancy dark grey-blue stone — originallygiven to Queen Elisabeth Farnese...
Polished Markets Mar 22, 2018 Rapaport News
Bonhams 4.03ct. blue diamond
Bonhams to Auction 4.03ct. Blue Diamond
A fancy intense blue diamond will lead Bonhams’ Londonauction next month, with the company estimating it could fetch close to $2million. The pear-shaped, 4.03-carat stone has been in a UK privatecollection for more than 30 years, Bonhams...
Polished Markets Aug 21, 2017 Rapaport News
blue diamond
Petra's Revenue -41% to $96M in 3Q
Petra Diamonds reported that revenue fell 41 percent year on year to $96.1 million in the third quarter that ended on March 31. The company sold 826,815 carats during the period, representing a 9 percent decline. Production...
Mining Apr 16, 2015 Jeff Miller
blue diamond
Petra Sells 122.52-Ct. Blue Diamond for $28M
Petra Diamonds has sold a 122.52-carat blue diamond recovered from its Cullinan mine for $27.6 million or $225,269 per carat.The diamond was sold to a beneficiation partnership, Petra stated. The partnership is 85 percent owned by a diamond...
Rough Markets Sep 16, 2014 Deena Taylor
Cora Blue Rough
Blue Moon Diamond Goes on Display in L.A.
A rare 12-carat, internally flawless, blue diamond, known as the Blue Moon is on display at the Natural History Museum in Los Angeles The Blue Moon was cut and polished from a 29.60-carat, blue rough diamond recovered...
Polished Markets Sep 14, 2014 Deena Taylor
Finsch Mine
Petra's 3Q Revenue +55% to $164M
Petra Diamonds reported that revenue rose 55 percent year on year to $163.9 million during the third quarter that ended on March 31 as production rose and rough prices firmed. The company sold 905,781 carats during...
Mining Apr 23, 2014 Deena Taylor
Letseng Mine
Gem Diamonds' Letšeng Sales +57% in 4Q
Gem Diamonds reported that rough diamond sales from the Letšeng mine in Lesotho jumped 57 percent year on year to $75.6 million in the fourth quarter of 2013. The average price of the goods rose 49 percent mainly...
Mining Jan 28, 2014 Deena Taylor
Finsch Mine
Petra's 1H Revenue +19%, Production +33%
Petra Diamonds reported that revenue grew 19 percent year on year to $185.5 million for the first half that ended on December 31. The volume of diamond carats sold during the period rose 33 percent to 1,140,479...
Mining Jan 23, 2014 Deena Taylor
Petra 26ct Blue Jan 2014
Petra Recovers 29.60-Ct. Blue Diamond at Cullinan
Petra Diamonds recovered a 29.60-carat, vivid blue diamond at its Cullinan mine in South Africa. The diamond has extraordinary saturation, tone and clarity, the company said. Petra described the diamond as one the most...
Rough Markets Jan 21, 2014 Deena Taylor
Gem Diamonds12.47ct blue
Gem Diamonds Recovers Two Rare Diamonds at Letšeng
Gem Diamonds recovered a rare blue,12.47-carat diamond and an 83.8-carat exceptional-quality white diamond from its Letšeng mine in Lesotho in September. The blue diamond (pictured) was recovered from the main pipe, while the larger...
Mining Sep 29, 2013 Deena Taylor
blue diamond
Petra Sells Blue Rough Diamond for $17M
Petra Diamonds sold an exceptional 25.50 carat blue diamond that was recovered from its Cullinan mine in South Africa in April for $16,910,180 or $663,144 per carat.Johan Dippenaar, the CEO of Petra, said, “We are...
Rough Markets May 24, 2013 Jeff Miller
blue diamond ring
Blue Diamond Fetches Almost $2M Per Carat at Bonhams
Bonhams London sold an extremely rare 5.30-carat, fancy deep-blue diamond today for $9.5 million (GPB 6.2 million), or $1.8 million per carat, to Graff. The auction house stated that bidding on this gemstone came...
Polished Markets Apr 24, 2013 Jeff Miller
Cullinan Blue April 2013
Petra Recovers 26-Ct. Blue Diamond at Cullinan
Petra Diamonds recovered a high-quality top-color 25.50-carat blue diamond from its Cullinan mine in South Africa.The diamond follows a line of other special blue stones that Petra has recovered at Cullinan since acquiring the mine...
Rough Markets Apr 17, 2013 Deena Taylor
Sotheby's Hong Kong Blue Diamond
Fancy Vivid Blue 6ct. Diamond Sells for $10M
Sotheby’s Hong Kong received a record price for a fancy vivid blue diamond sold at auction this week as its Magnificent Jewels and Jadeite sale. The auction closed with a total of $65.4 million (HKD 510.2...
Polished Markets Oct 06, 2011 Avi Krawitz
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