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The diamond is a very special gemstone of extraordinary brilliance. The name diamond comes from the Greek "adamas" and is translated as " invincible", which describes the special properties of the mineral. It is the hardest, rarest and most prized mineral, in the world. Diamonds are formed from crystallized pure carbon. Apart from the colorless variety, they can take on almost any color in the entire spectrum: Brown, yellow, gray, red, pink, blue or green. There are four factors that determine the uniqueness and ultimate value of a diamond. These are the quality standards, known worldwide as the 4 Cs, which include the following characteristics:

Carat Weight

The first "C" is "Carat Weight" and one carat is equal to 0.2 g and is the one standard weight unit used to calculate the weight of gemstones. If the remaining three factors are identical to the other diamonds, then the larger the diamond, the higher the value.

Clarity Grade

The second "C" is Clarity. Almost all diamonds contain a small amount of carbon or other minerals inside, called inclusions. They are visible under a magnifying glass and make each gemstone unique. It seems obvious that the fewer inclusions there are in a gemstone, which means the purer the gemstone is, the higher its value.

Color Grading

The third "C" is Color. The most valuable diamonds are colorless. However, most diamonds have a yellowish, or brownish tinge that diminishes the value. Diamonds that have the intense "fancy colors," such as champagne, pink, green or blue, are considered particularly rare and have a high value.  


The fourth and hence the last "C" is "Cut". The cut is decisive for the brilliance of the gemstone. It reflects light and scatters it inside. These characteristics are found only in ideally cut diamonds, which is one of the quality criteria at Goyel. The cut should not be confused with the shape of the diamond.

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