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Petra to Hold Tender for 20-Carat Blue Diamond
Analysts say it could sell for as much as $15 million.
Petra Diamonds uncovered this 20.08-carat gem-quality blue diamond at the Cullinan mine last month and will hold a tender for the stone in November.
London—Petra Diamonds said it will hold a special tender for an “exceptional” large blue diamond recovered in South Africa last month. 
Viewings will take place from Friday, Nov. 1 to Thursday, Nov. 7 at Petra’s diamond marketing offices in Johannesburg.
Appointments can be made by contacting either Greg Stephenson, group head of sales and marketing at (+27) 836-379-849 or Greg.Stephenson@petradiamonds.com, or Stephanie Hulett, sales and marketing, at (+27) 716 722 570 or Stephanie.Hulett@petradiamonds.com.
The tender will be held Friday, Nov. 8 through Friday, Nov. 15 at 12 p.m. at the city’s Diamond Exchange and Export Centre (DEEC).
Viewings during this time will be facilitated by the DEEC; bookings can be made by contacting them directly at (+27) 11-223-7077.
Shore Capital said in a note Monday it expects the diamond to fetch between $13 million and $15 million, while investment bank Berenberg valued it at between $10 million and $15 million, Mining.com reported.
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