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Diamonds are precious gemstones which throughout history, have been admired for their brilliance. Even today, diamonds are highly valued. They are the perfect way to express eternal love and people are using it more every day to show others their true identity. Apart from being one of the most solid materials, a diamond also is a beautiful stone which, if polished properly, has rainbow reflection like no other gemstone.

When buying a diamond it is crucial to take into account a couple of factors which determine the value of a diamond. On top of that, you want to be sure the diamonds you purchase are obtained legally and that you have a lifetime certified warrant of authenticity on your diamond. Therefore we recommend purchasing your diamond from a certified dealer.

A safe way to find the perfect diamond, with help of experts

A basic knowledge or assistance is required in order to decide on which colour, clarity of the diamond and its cut, to get that highly desired brilliance. Our team of experts have filled our FAQ database with all there is to know about diamonds. If you are unable to find the right answer in our database, our experts are more than happy to help. Please feel free to contact us via chat, e-mail or telephone.

Our diamonds are conflict free and come from the best diamond dealers from Antwerp. Our diamonds from 0.30 crt and more come with an official certificate from the renowned GIA or HRD. On top of that, DiamondsByMe is the most significant Dutch supplier of diamonds. Customers have access to free information on diamonds. Our mission is finding you the right diamond, matching your personal budget.

What is a diamond?

Diamonds are the most solid natural resource available. A diamond consists of crystallized carbon and is formed under high pressure at depths of 140 to 190 miles. This makes them difficult to locate and therefore very rare. Uncut diamonds have a characteristic octagonal shape and they disperse light. With the right light, a diamond shines brilliantly. That makes a diamond a beautiful, popular piece of jewellery. Read more about the origin of diamonds

After retrieving them, uncut diamonds are shaped to enhance light dispersion. Imperfections are carefully removed with the sole purpose of maintaining its caratage. The diamond will be judged according several criteria to determine its value. The top four criteria is known as the 4 C’s, which are GIA enforced.

The four C’s of a diamond

Diamonds are extremely rare and a product of nature. This makes each diamond a one of a kind and unique. There are four main factors, the four C’s, which quantify the value and quality of a diamond. The 4 C’s of a diamond are:

1. Cut

2. Colour

3. Clarity

4. Carat

A combination of these four C’s make it possible to make a standardized evaluation of each individual diamond, which is used to determine its value.


The cut, the first C, is the only factor which can be influenced by man. The other three C’s are solely determined by nature. Cut entails more than the commonly known shape of a diamond, such as an emerald, marquise, heart or oval. Symmetry, proportions and polish are equally important.

• Symmetry: the precision of the of the shape of the diamond and placing of the facets.

• Polish: the condition of the surface of facets. In this respect, it is important that there are no visible stripes.

• Proportions: the measurements of the diamond which have to be in balance with the crown, size of the table and the pavilion. These measurements influence dispersion of light greatly.

If the diamond is too deeply cut, light will reflect poorly via its crown, resulting in the lack of the beautiful sparkle. If the proportions of the diamond are too shallow, light seeps through the bottom and the diamond will appear dull. It takes the right depth to get a sparkle which is clearly visible.

Symmetry, polish and proportions are each individually measured and then the diamond is classified (Excellent, Ideal, Very Good, Good or Fair) according GIA regulations. DiamondsByMe maintains a standard level of XXXN quality. This stands for “Triple X None”, three times excellent when it comes to symmetry, polish and proportions with absence of fluorescence. Read more about GIA.


The colour of a diamond is a very important factor in classifying a diamond. For a colourless diamond, a total absence of colour is desirable. For a diamond with colour, called fancy coloured, the opposite is true. The standard for a coloured diamond is, the more exuberant, the higher its value.

The grading of a colourless diamond is determined by a colour grade chart. This scale starts with the letter ‘D’, which means rarest and most desirable quality of colour, and it goes down through Z. A diamond of quality ‘Z’ has a yellow to brown glow.

The colour of a diamond is determined by ‘master stones’. These are gemstones of a specific colour which are used to measure the colouring of another diamond. A D diamond, for instance, is compared to one with the classification ‘G’. these ‘master stones’ need to have a minimum size of .5 crt. in order to display colouring properly. GIA has thé best specialists on grading colour.

The diamonds we offer at DiamondsByMe are graded G, E or D. The colour D combined is with VVS quality, E is combined with VS clarity diamonds and G with an SI diamond. If you are interested in a specific combination of colour and clarity, please feel free to contact us. We are more than willing to help you find the perfect diamond.

D Exceptional White (Jager)
This is almost colourless. Some D diamonds seem to have a blue glow. The D colour is presumed to be most valuable.

E Exceptional White (River)
E diamonds are still of exceptional quality. You hardly notice the difference.

F Rare White (River)
As you can see in the table, the letter E and F were first referred to as River. This to show how small the difference actually is.

G Rare White (Top Wesselton)
The G coloured diamond is the most popular in the Netherlands. It is still very hard to distinguish the differences between diamonds D, E, F (River).

Not until the letter H (Wesselton), it is hard to make the distinction between different diamond colours. When compared with a D colour diamond, it is easier. An H diamond is still of exceptional quality though.

I-J Slightly tinted white (Top Crystal/Crystal)
The name says it already, the I and J diamonds are a bit white. From here colour difference is noticeable. The diamonds often have a yellowish colour and are commonly known as ‘near colourless’.


Each diamond has imperfections, either on the surface or internally. Impurities on the surface are referred to as blemishes and internal flaws are called inclusions. Most flaws are hard to see with the naked eye and require 10x magnification.

Flawless diamonds are extremely rare. Diamonds are classified according an international scale which ranges from least imperfections, called flawless, to most imperfections, called imperfect.

Factors which influence the purity of a diamond:

• Amount of inclusions

• Size of inclusions

• Position of the inclusions

• Colour of inclusions

• Type of inclusions (a cloud of tiny inclusions, for instance, has less effect than one big black cavity)

You are able to tell the difference between an SI and VS diamond by looking at its inclusions, or impurities.

SI (Small inclusions): the lowest grade with visible flaws, such as black dots

VS (Very Small Inclusions): grade for diamonds with inclusions which are not visible to the naked eye. So they appear to be flawless.

VVS (very very small inclusions): A flaw exists, but this can be detected solely under 10x magnification by a skilled grader.

As the size of a diamond increases, inclusions will be easier to detect. Therefore we recommend a .2 crt. VS quality diamond. This does not automatically mean that when you order a bigger SI diamond, this will be filled with black cavities. Visible inclusions are a thing to consider though. We are dealing with a natural product, each stone is unique and so are its inclusions.

Diamond carat weight is the measurement of how much a diamond weighs. Carat is the most commonly known of the four C’s in means to determine the value of a diamond. Just keep in mind that the value of a diamond does not automatically increase equally in value when carat increases. This because the value of the diamond itself does not increase gradually per carat.
In order to determine the right carat, special equipment is used. To better illustrate the size of our diamonds, we also mention sizes in mm. In respect to coloured stones, mentioned sizes are in mm only. With these stones, it is not size that matters most, but colour and clarity instead. In respect to our diamonds, we do mention carat because this is commonly known and far more important when determining the price of a diamond. crt

Carat, compared to the other three C’s, almost always has a fixed price. Diamond dealers worldwide usually work with a set fixed price. When a diamond is bigger and has few flaws, you see a large jump in price. Finding the right diamond is not easy. This is why a diamond of .5 crt, or more, increases in value exponentially.

Below you see an example of a price difference per carat, assuming the diamond has a simple shape and is of excellent quality.

0,25 ct price € 650,-
0,50 ct price € 1600,-
1,00 ct price € 5300,-

Choose your own diamond

DiamondsByMe offers you the opportunity to create your own diamond jewellery. You are able to select a diamond which is not mentioned on the website, for instance. A different Clarity, Colour, Carat, or Cut. The choice is yours.

After consulting, you will choose the most exquisite sparkling certified diamond, according to your budget. Even designing your own diamond jewel is possible with help of our master goldsmiths!

Please feel free to contact us and learn more about the endless possibilities.