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A Guide to Certified Diamonds

Certified Diamonds

Whether you’re looking for a diamond engagement ring or a pair of diamond earrings, there’s no denying that diamond certification can be a bit confusing. Does a certificate mean the diamond is top quality? Do only the most expensive diamonds have certificates? There’s no need to panic. We’ll break down what you need to know about certified diamonds.

What is it?

Diamonds are assessed and graded by third-party laboratories before they get made into a beautiful piece of jewellery. Several elements of the diamond are described by the certificate. Such elements include clarity, colour, and dimensions. Buyers are therefore given a chance to consider whether the diamond they are looking to purchase is worth the price being asked by the seller.

Different organisations grade diamonds to slightly different standards. However, this means you could have two very similar diamonds with quite different certificates. As a result, it’s important not to rely solely on diamond certification when deciding whether to buy or not. How it looks to the naked eye is important, and diamond experts are available to review stones for buyers who are really unsure.

certified diamonds under magnifying

Which Organisation Is The Best For Diamond Certification?

Several entities exist that grade diamonds, and the key is ensuring your certificate comes from one of the more reputable ones. Labs such as these have been known to grade consistently and accurately. As a result, the details on the certificate matches the stones’ actual clarity and colour most closely.

The three leading bodies within the diamond industry are the GIA, IGI, and HRD. Certificates from any of these should mean your diamond is being priced based on its actual characteristics.

Clarity runs from flawless, which contains no blemishes, to included.  Blemishes can be clearly seen at magnification with included diamonds.

Colour is usually measured on a lettered system, where the closer the letter is to the start of the alphabet, the clearer the diamond. As a result,“D” normally represents a completely colourless diamond.


A seller offering an “independent” certificate must be questioned. Therefore, it’s possible that the information on the sheet does not accurately describe the stone. Both colour or clarity could be different to the actual stone on sale. As a result, the seller will charge more for a stone.

Here at Bespoke Diamonds we provide a diamond certification along with your diamond. Our diamond engagement rings can be amended to suit your budget and style. As a result, we can find the perfect diamond for your setting. For more information please contact us at or call 01-6855800.

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30% to 50% below retail

Due to our low overheads and our network of diamond brokers, we can offer significant savings with no compromise on quality or service.

Over 500 rings in stock

Large range of engagement rings, coloured stones rings and wedding/eternity rings, along with a large range of loose certified diamonds.

Free independent valuation

All our engagement rings come with a free independent valuation worth €100 from Irelands leading gemmologist.

All diamonds fully certified

All our diamond are certified by the most reputable bodies GIA; HRD or IGI. All conflict free and hand selected by our diamond expert.

Quality in everything we do

Our focus is on building lasting relationships with our customers. 30 day refund or return policy to allow you buy with total confidence.