The De Beers Group of Companies is the world's largest diamond mining house, supplying over a third of the total global supply of rough diamonds, by value. It sells rough diamonds contractually ten times a year to 'De Beers Sightholders': a selected group of diamantaires who have demonstrated both outstanding business performance and ethical accountability. Rough diamonds are supplied in Botswana, Namibia and South Africa, at these regular 'Sights'.

De Beers Sightholders are selected on their proven abilities in the core areas of business and strategic planning, manufacturing excellence in relevant categories of rough diamonds, business reputation and strict adherence to a code of ethical accountability.

The benefits of being a De Beers Sightholder include quality, consistency and predictability of supply, as well as enhanced corporate reputation. Sightholders are recognised as being amongst the most important diamantaires within the industry and competition to become one of them is consistently fierce.

Bonas is privileged to count a large list of Sightholders among its clients, and is actively engaged in working with companies keen to receive supply from De Beers, helping them to fulfil De Beers' stringent selection criteria and ultimately to be accorded Sightholder status.




Polished Coloured Gemstone Tender - Hong Kong viewings:

- 12 September - 16 September (17 September 11am CET)

Braúna mine

Braúna - Antwerp viewings:

- 12 - 22 November (23 November 1pm CET)

Lucara Diamond Corp : Karowe mine

Karowe - Botswana only viewings:

- 3 - 13 December (13 December 4pm CET)

Mountain Province: Gahcho Kué mine

 Gahcho Kué - Antwerp viewings: 

- 24 September - 4 October (5 October 3pm CET)

- 24 October - 6 November (7 November 3pm CET)

Namakwa Diamonds: Kao mine

Kao - Antwerp viewings: 

- 17 - 28 September (1 October 3pm CET)

- 26 November - 6 December (7 December 3pm CET)

Stornoway Diamonds: Renard mine

Renard - Antwerp viewings:

- 9 - 19 October (22 October 3pm CET)

- 19 - 29 November (30 November 3pm CET)

    * Subject to change


If you wish to schedule an appointment, please contact our Antwerp office at:
+32 (0)3 233 70 80
diamondbrokers bonasgroup com


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