Help Centre Certifications

Help Centre - Diamond Certificates - Authentication of Cut, Clarity, Colour and Carat

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A diamond certificate means that all elements of the
diamond you purchased have been examined and
rigorously tested.



Your certification report is recognised proof of the 4 C’s of your diamond's: Cut, Clarity, Colour and Carat weight

A diamond certificate means that all elements of the diamond you have purchased have been examined and rigorously tested by an unbiased and professional examination to authenticate the diamond’s attributes.


Purely Diamonds diamonds are almost always graded by either IGI or GIA. All the certification companies we use are independent bodies that test, grade and certify your diamond through their specialist examination processes.

To receive a diamond report certificate at least one of the diamonds in your item must weigh 0.25ct+ and be graded G colour or better. Alternatively if you choose diamond colour grades H or I, at least one diamond must weigh 0.30ct+.

If you purchase for example a 15 stone eternity ring where each stone is small, you will not receive a diamond certificate. This is standard across the industry, as diamonds of this size are never certified individually.

All items that carry a certification report are flagged as such on the product page

Stones weighing less than 0.25ct will not be certified, but will be accompanied by a signed valuation document as confirmation of the quality of the diamond. This is standard practice throughout the industry; in fact, some companies don't certify stones under 0.33ct.

The valuation document is your assurance that what you are purchasing is genuine and exactly as described on our website.



Every item we sell comes with a free valuation document. The document will confirm the carat weight, cut, colour and clarity of your chosen diamond/s, as well as a picture and description of the item.

Our valuations are carried out by an experienced FGA (Fellow of the Gemological Association) and GG (Graduate Gemologist) certified diamond grader, so this document not only gives you an accurate valuation of your chosen piece, but it is confirmation of the quality of the diamond/s you have purchased from us.

Insurance claims involving items with an up-to-date valuation containing an accurate description, are likely to result in a quicker and more satisfactory outcome for you. So as a customer of Purely Diamonds you have peace of mind at no extra cost.