Sightholder directory




Head Office

Address 67 New Castle Street, Windhoek, Namibia

Sales Offices

Address Pelikaanstraat 62,
Antwerp Diamant Club Suite 220-221,
2018 Antwerp,
Bulent Seber

Short Facts

Year of establishment 2001
Number of employees 96
Number of offices 4
Number of factories 1

Group companies

  • Hard Stone Processing (Pty) Ltd
  • Seber Creations bvba

Hard Stone Processing (Pty) Ltd


Hard Stone Processing Pty Ltd (HSP), established in 2001, is a Namibian diamond cutting and polishing factory.  In joint venture with Namibian shareholders, it is part of the Seber group of international diamantaires.

HSP has successfully achieved its transfer of skill and today boasts a highly skilled Namibian workforce who is fully in charge of production.

HSP specialises in manufacturing 2.5-14.8 carat high quality rough diamonds.  HSP’s polished diamonds are exported to Antwerp for global distribution through Seber.  Turkey, and its surrounding region, is a core market where Seber especially enjoys significant competitive advantage through its historical role and thorough market knowledge.

HSP strongly supports Namibian jewellers in the Namibian diamond jewellery trade.  It is a leading supplier of polished diamonds in Namibia and has established key partnerships with the Namibian jewellery industry. HSP has created and promoted tamper proof seals for its polished diamonds and for its proprietary Namibian Sun® cut.

HSP is a proud NDTC Sightholder since 2007, a member of the Diamond Manufacturers’ Association of Namibia (DIAMAN), a member of the Namibia Chamber of Commerce and Industry (NCCI) and Team Namibia.

Corporate Social Responsibility

HSP fully complies with the Best Practice Principles and Namibian laws. HSP fully adheres to and is committed to the KP process. HSP is a conscientious investor in Namibia, creating jobs, transferring skills and supporting local social welfare activities.  HSP is a member of Team Namibia and the Namibian Chamber of Commerce and Industry to promote Namibian products.

Core Business Activity

Wholesaler, Preparer and Polished manufacturer

Product Range Overview

Core Polished Diamonds

Size: 0.30pt-20ct; Color: M-D; Purity: SI2-IF; Make: Vg-Ex; GIA & HRD

Polished Outcome

Micro pave Melee 3rd, 5th, Quarters Pointers +1cts +3cts +10cts Fancy shapes Fancy colours Proprietary or branded makes
      x x   x     x

Additional Services

HSP offers its customers the targeted range of diamonds they need for the markets they operate in supported by an exceptional level of customer service. In doing so it fully supports the diamond purchasing activities of its customers and frees them to focus on their core jewellery business. This enables HSP to add maximum value to its entire range of rough supply