A certificate is the diamond's ID card. It lists weight, colour, clarity, cut and fluorescence and is the basis professionals use to calculate price.
Recognised laboratories
- GIA – Gemological Institute of America, the global standard
- HRD Antwerp – the European reference
- IGI – International Gemological Institute
Certificates we do not accept
We do not buy or assess diamonds with AIG, GRA, GWLAB or ALGT certificates. We do assess uncertified diamonds from 1 carat per single stone.