BGI certificates: The GIA was founded in 1931 and so is still the best known certificate. The BGI certificates are based on a set of GIA reference Master Stones graded by Lazare Kaplan and GIA in New York, and so are now well recognised and you may find one of the many thousands in existence.
The BGI PRECISION DIAMOND GRADING SYSTEM is the only one in the world to split each colour into one hundred parts, which greatly increases the accuracy of grades. Founded in response to some members of the World Federation of Diamond Bourses, the BGI has accreditation from the UK government Department of Trade & Industry (DTI). The BGI also developed a new coloured diamond grading system and have patented the world''s first global anti-fraud system to combat crime.
The BGI are well respected and have a rapidly growing client base, see more on WWW.BGIUK.COM
I''m assembling a list of labs that issue diamond grading reports and I''m happy to include yours. Please send me a copy of the front and back (if there''s anything printed on the back) of each variety of report that you make. If you care to read about it, the discussion thread about this is project is here.