- Full Gem-A Diamond Grading Report
- Full CIBJO Diamond Report
- Verbal assessments of colour and/or clarity
- Advice about re-polishing of diamonds
- Detection of laser drilling and infilling
The Gem Testing Laboratory of Great Britain Diamond Report is based on the principles of harmonized grading for colour and clarity of diamonds and gives the most essential and up-to-date information required by the trade. We grade all sizes of diamond. In addition, we are the only laboratory in the UK registered by CIBJO to issue CIBJO Diamond Grading Reports.