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If you are looking for the perfect diamond engagement ring, you may not have all enough information about purchasing gemstones. Even if buying a jewel is a new experience for you, this does not mean it should be an overwhelming one. Understanding the quality characteristics of a gemstone is a fairly simple and unequivocal process. This basic k knowledge will not only help you unlock the mystery of a jewel’s quality, but it will help you understand its value and price. If the thought of purchasing from a wholesale diamond supplier London is paralysing, then you should learnt the four Cs of buying a gemstone.

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What is important to keep in mind is the fact that cut does not refer to the shape of the gemstone, but rather to the proportions and the arrangement of its facets. Of all the four Cs, cut has the most significant impact on the beauty of the gemstone. When determining the quality of a cut, a diamond grader typically evaluates the cutter’s skill in the fashioning of the jewel. The fact is that the more precise the cut is, the more appealing the gemstone will be to the eye. The cut grade represents an objective measure of the rock’s light performance, or what people generally designate as sparkle. The amount of sparkle or brilliance is obviously decided by the cut. It is recommendable to buy the highest cut grade within your budget.


Gem-quality diamonds occur in many hues, from colourless to yellow or light brown. Other colours that you are likely to encounter are pink, red and blue, namely fancy colours. As a general rule, colour in a gemstone manifests itself as a pale yellow. Nonetheless, in most gems, the term colour actually refers to the absence of colour. The less colour a stone has, the more aesthetically appealing it is and therefore valuable. Even if the small differences in the hues are not visible to the naked eye, they impact the overall quality and price of the stone. After cut, colour is considered the most important characteristic when selecting a gemstone.


Diamonds also have internal characteristics that are known as inclusions or external characteristics and they are referred to as blemishes. Blemishes are the small and natural imperfections that occur even in the finest rocks. It is important to note that these imperfections are microscopic, which means that they cannot be observed without magnification, and they do not affect the gem’s quality or its appearance. Gemstones that have the smallest amount of imperfections usually receive the highest clarity grades.

Carat weight

Carat weight is a term that most people are familiar with and it refers to the weight of the diamond. A carat equals 1/5 gram and is subdivided into 100 points. The size of the jewel is typically evaluated by viewing it form the top due to the fact that this is the way they are presented to you when you buy a ring.  The more carat weight the gemstone has, the more expensive it will be. Carat weight is the most objective grade of the four Cs.

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