
Every stone weighing at least 0.25ct (SI quality or better), or at least 0.30ct (H P1 quality), is independently certified by one of 5 certification companies (AnchorCert, IGS, GIA, HRD or IGI).
You can see whether your item is certified by looking at your chosen product details under 'Certifications', where you will also see a logo for a Valuation Document.

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 Four Cs"--Cut, Clarity, Colour and Carat weight-- of your diamond/s.
Your report will most likely be from AnchorCert, IGS or GIA. AnchorCert are a British company (part of the Birmingham Assay Office), IGS (International Gemmological Society) are a British company, and GIA are an American company. All are independent bodies which test, grade and certify your diamond through their specialist examination processes. We also use IGI and HRD certificates for some items.
Stones weighing less than 0.25ct and/or less than 0.30ct P1 quality, 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 any stones under 0.33ct. The valuation document that you will receive if your stone is not certified, is your assurance that what you are purchasing is genuine and exactly as described on our website.

The largest diamond certification service in the UK —a department of The Birmingham Assay Office (founded by an act of parliament in 1773), the largest UK Assay Office.


GIA have graded diamonds such as the famous Hope Diamond and the De Beers Millennium Star.

IGI Certification IGI is the largest independent gem and jewelry certification and appraisal institute with operations worldwide. IGI is also an ISO accredited worldwide organization. Over the past three decades, IGI´s commitment to quality services, extensive experience, expertise and its longstanding reputation for reliability and integrity have made IGI the standard of excellence in gemology and fine jewelry evaluation worldwide.

