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.

20191008 Cullinan blue insertThe company unearthed a Type IIb, 20.08-carat gem-quality blue diamond at its Cullinan mine in September and now will put the stone up for sale.

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 This email address is being protected from spambots. You need JavaScript enabled to view it., or Stephanie Hulett, sales and marketing, at (+27) 716 722 570 or This email address is being protected from spambots. You need JavaScript enabled to view it..

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.

|Subscribe >
National Jeweler

Fine Jewelry Industry News

Since 1906, National Jeweler has been the must-read news source for smart jewelry professionals--jewelry retailers, designers, buyers, manufacturers, and suppliers. From market analysis to emerging jewelry trends, we cover the important industry topics vital to the everyday success of jewelry professionals worldwide. National Jeweler delivers the most urgent jewelry news necessary for running your day-to-day jewelry business here, and via our daily e-newsletter, website and other specialty publications, such as "The State of the Majors." National Jeweler is published by Jewelers of America, the leading nonprofit jewelry association in the United States.