An Introduction to GIA Dossier Diamond Reports
What are GIA Dossier Certificates?
GIA (the Gemological Institute of America) introduced Dossier certificates for diamonds 0.99cts and below this weight. They are now offered for diamonds weighing 0.15cts – 1.99cts. GIA certified diamonds with a Dossier report, note important details listed on the report, specific to that diamond. The layout appears easy to read with the most important details clearly laid out. These include the certificate number, shape, carat weight, colour, clarity, and important details on the proportions of the diamond. Diamond certification provides consumers with the reassurance that the diamond being sold is exactly as described. The diamond undergoes scrutiny by qualified Gemologists at GIA under strict laboratory conditions.
Are all Diamonds Certified?
Not all diamonds receive certificates, but over the last 10 years, demand for certification has increased dramatically. A diamond grading report represents an important document for both reassurance and to further verify the insured value of an item. It is surprising to find many single diamonds without even a description on the diamond colour and clarity grade within the window of many high street jewellers even today.
Across the world, only a small proportion will receive GIA Dossier certificates. A great many diamond grading laboratories exist, including IGI (one of the other certificates we insist upon) discussed before in our recent post. GIA is generally regarded as the most consistent. I have seen minor inconsistencies over the years, even with GIA certified diamonds, but they keep up a very good reputation. The cost of GIA certified diamonds often comes at a premium higher than diamonds graded at other institutions, especially those with Excellent or Very Good Cut grades. We strive to offer both GIA and IGI certified diamonds with a minimum Very Good cut where applicable. The cut grade relates specifically to round brilliant cut diamonds with GIA certification. This is often misunderstood and misrepresented by sellers claiming to have fancy shape GIA certified diamonds possessing excellent or very good cut grades. GIA will never note ‘ideal’ cut either. Excellent is the highest cut that a diamond will achieve, although certain proportions appear as ‘ideal’ by other laboratories and organisations.
For a list of further laboratories please see our diamond certification information page.