Synthetic diamond certification is being added to HRD Antwerp's offer as it seeks to support consumers in their diamond purchasing.

The Antwerp-based diamond certification service plans to introduce its lab-grown diamond certificates on September 2 following a reported rise in synthetic diamonds entering the market.

HRD plans to make its synthetic diamond certificates noticeably different to its standard diamond certificates to ensure there is no confusion between lab-grown and natural stones. The words 'Synthetic Diamond Certificate' will also be printed on the cover of each report.

HRD said that each synthetic diamond will be laser-inscribed as synthetic and the presence of the laser inscription is mentioned on the certificate, with a statement that the diamond has been lab-grown.

The business also offers a service for screening packets of diamonds to pick out any stones that might be HPHT or CVD synthetic diamonds.