Gemological Certification in Hatton Garden

Gemological Certification

A certificate is what turns a seller's word into something you can actually rely on. Gemmological certification confirms a stone's identity, its grading, and any treatments it has had, all set down by an independent laboratory rather than the person selling it. In Hatton Garden the labs, trade desks and specialists who arrange these reports work within a few streets of each other around EC1N.

What a report actually tells you

The five providers listed here arrange documentation for both diamonds and coloured stones. A typical report records carat weight, cut, clarity and colour, and will often note fluorescence, any laser inscription, and evidence of enhancement. Standard gemmological testing also separates natural, treated and lab-grown stones, which is exactly the distinction that catches buyers out when there is no paperwork to lean on.

• Which laboratory issues the report, GIA, IGI, AGS or EGL?
• Does it cover treatments and origin, or grading alone?
• What turnaround should I expect?
• Is a laser inscription included so the stone matches its report?

Reports are most often pulled for high-value purchases, insurance, estate jewellery and resale, anywhere clear documentation changes the price or the cover. London work may also tie in with bodies such as the London Diamond Bourse and Gem-A. Compare the listings below by specialism and turnaround, then book the testing you need.