The 4 Cs of Diamonds

If you have been looking for engagement rings, then you’ve probably heard something mentioned about the 4 Cs of diamonds.  This is how diamonds are graded in terms of quality and this has an enormous effect on the price of the diamond. While many have heard about Diamond Carat, it is often misunderstood so we have explained it clearly along with the other Cs which are actually equally important to the price and quality.

DR022 oval cut lab grown diamond solitaire engagement ring Dublin Ireland jewellers Commins and Co
1.43ct Lab Grown Diamond Solitaire Engagement Ring – DR022


A diamond’s carat is a description of its overall weight. This metric is used for both natural and lab-grown diamonds. Contrary to popular belief, the carat is not descriptive of the overall size of the diamond. This is instead measured in millimetres. The heavier the diamond, the higher the carat and therefore, the higher the cost. It is important to note that just because the carat is impressive, it doesn’t mean that the other Cs are up to scratch.


A diamond’s colour is the result of chemical impurities within the stone. The most commonly displayed tones being brown or yellow. The less colour a diamond exhibits, the rarer and therefore valuable it will be. The colour of a lab-grown diamond is determined based on the Gemological Institute of America’s (GIA) criteria. As with natural diamonds, the colour of a lab-grown diamond is subtle in nature and will vary from diamond to diamond. This can range on an alphabetical scale from D to Z. The former being virtually colourless and more valuable. However, the latter being noticeably yellow in colours and therefore, less valuable. Our range of colours are handpicked to ensure excellent light refraction and a long-lasting sparkle.


Diamond Clarity generally refers to how free a diamond is from inclusions and blemishes. These blemishes can stop light passing through the diamond. In naturally mined diamonds, these blemishes result from minerals or fractures during a diamond’s formation deep in the earth. The main difference is that the inclusions in lab-grown diamonds tend to be a bit darker in colour due to their synthetic manufacturing process. As a result, we advise going higher on the clarity grade for lab diamonds.

Lab Grown Diamond Engagement Rings Dublin Ireland Jewellers Commins And Co


Perhaps the most important aspect of a diamond is the diamond’s cut. This will influence how bright it looks, especially when seen in the light. With so many choices such as brilliant, oval, cushion, and radiant. The cut can make all the difference to how bright your diamond looks. This is regardless of how large or heavy it is. The round brilliant cut diamond has max sparkle. As a result, its the most popular diamond shape. In short, the cut is a direct representation of the skill of the jeweller who designs and cuts the facets on an individual diamond. You can trust the artisans here at Commins and Co to only produce the finest quality cuts ensuring an unparalleled appearance.

Sustainable, ethical, and beautiful.

Here at Commins and Co, all of our diamond jewellery is designed and created in Dublin. We use the highest quality lab-grown diamonds and ethically sourced gold. When you buy a unique piece of jewellery from us, you are not only getting a beautiful diamond. You also the peace of mind that its high quality is the result of a sustainable process. Best of all, our lab-grown diamonds offer a very competitive price. Ensuring you get the best possible jewellery for the best possible price. As a result, giving you excellent value for money without compromising on quality.

All our engagement rings are available with lab grown diamonds as an option.