Diamond is not the same diamond – on the contrary, there’s this gem in diverse sizes, shapes and colors. Also, he can either beautiful fiery sparkle or tarnished look. To get the reasons for this on the track, it has developed a method to classify the “King of gems” based on certain criteria. These are named The four CS , because the English names all start with a C : cut (grinding), clarity (purity), colour (color), and Carat (karat). The value of a diamond depends these four points, which will be presented hereinafter individually for a better understanding.
Cut (diamond cut) – responsible for the fire of a diamond
Diamonds, so as to find them in their raw form in nature, have a bleak and dull surface – the fascinating about these gems is but their glitter.
In its most beautiful glory shines a diamond brilliant cut, a form of their ongoing development can be traced back to the 13th century. At that time began to Polish the surfaces of the octahedron shaped inconspicuous diamond crystals before the cut shape has been refined and gradually more and more until she culminated in 1910 in the brilliant cut 56 facets. This is today considered classic and represents the most common cut for diamonds.
In addition, many other shapes on the market, the so-called Fancy Cuts are (also known as fancy =). However, the assessment criteria are most elaborate for the brilliant cut.
The correct Proportioning of the diamond is important here, because only so can light beams invading into the Crystal back be mirrored by facet to facet and in the colours of the Rainbow in the eye of the beholder. As a prerequisite, the diamond must be either too shallow or too deep, because otherwise the light through the gem would pass without being reflected.
Of importance in polishing, it is also that the girdle – the widest part of the diamond – is neither too thick nor too thin. The shine would otherwise be minimized in one case, in another case, the gem would be more prone to damage.
Together with the cut, the Finish is evaluated which composed of the symmetry and polishing. Here, it is crucial that the facets are evenly and precisely placed and the diamond has no scratches or polishing strips.
The quality of the cut is graduated by a scale, good (good), fair (pretty good) ranging from excellent (excellent) on very good (very good), going to poor (bad).
Clarity (purity diamond)-popularity of diamonds with high transparency
In addition to the cut, the purity of a diamond has a big impact on his brilliance. The purity is marred by so-called inclusions, located in almost every diamond different strong expression. You are very different in nature: it can with them minerals be entered before or during the crystallization deep below the Earth’s surface in the diamond. In addition, the purity of a diamond by subsequently incurred stress cracking can be affected.
For graduation of purity is taken into account, how many inclusions are in the diamond, whether these are middle or rather inconspicuously on the edges of the gemstone and they are as full of contrasts.
Depending on the appearance of inclusions, fixed terms for them have emerged in the jargon. Collections of many tiny crystalline inclusions called clouds; Feather hot cracking, worthy of the name because of its white color and form.
Evaluated the purity of a diamond one today is under the microscope in tenfold magnification with the help of the GIA (Gemological Institute of America) developed scale, for IF (internally flawless, flawless) starts and ends with PI3 (Piqué 3, very large inclusions).
Colour (color) – diamonds in high fine white up to the colourful Fancy Diamonds
The most finely graded shades of yellow diamonds occur in nature. Generally here that they are most sought after when the yellow share is as low as possible. In a most pure white light is split is most in the colors of the Rainbow.
The internationally valid rating scale for the range from D (very fine white) to Z (yellow) color of a diamond. Out of date now are the so-called Old Terms: River, Wesseltonand Crystal Cape. These names derive from archaeological sites, of which mainly diamonds in a particular shade.
The classification of the color must be made by a qualified electrician under standard viewing conditions. There are strict international guidelines for this process, among other things is precisely laid down what diamonds may be used as comparison stones.
In the series, the so-called fancy diamonds (colored diamonds) dance in this context. For them, the system to the graduation of color has no validity, but different values are applied. So, just the intense and vivid colors are viewed in the fancy diamonds .
Cacounsel (Carat) – unit of weight for diamonds
Specifying the dimensions of a diamond in carat. The name of this unit comes from the Greek, in which the word keratio refers to the seeds of the carob tree. Their peculiarity is that they all have the same weight of 0.2 g and therefore traditionally served as a unit of measurement for precious stones.
To note is that the number of carats are no reliable information about the size of a diamond – this is also dependent on the proportions. For the size effect, the execution of the cut also plays an important role; the more care it is used, the gem will appear bigger and brighter.
Alternatively, the weight of a diamond is specified in points, with 100 points correspond to a carat; a diamond of a half carat would thus 50 points.
With regard to the prices, is to note that the price per carat with the size of the diamond significantly increases. So, a Zweikaräter is not about twice an Einkaraters, but due to its rarity more. In the price structure are also to detect cracks: while the value of 0.95 Karäters only slightly above a 0.90 Karäters, a one-carat stone is significantly more expensive.
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