The 4C's for Evaluation of Diamonds

Color – The color of a diamond refers in actual fact to its lack of color. The most highly prized diamonds are the most transparent ones, which are the most expensive. Colors of diamonds are rated by a letter chart. The highest color rating is D, when there is no color at all. As the diamonds become more and more yellow, their value decreases. The letter chart relates to white diamonds. There are also colored diamonds, which are rare and expensive.

Clarity – A diamond's clarity is rated according to the number of black "pinpoints" in it – these are tiny carbon crystals that have remained from its crystallization, nature's "finger mark" that renders every diamond unique in itself. Most of these "pinpoints" are so tiny that they are not visible to the eye. There is a direct correlation between the value of a diamond and its clarity rating - the higher the clarity rating, the higher the value of the diamond.

Existing Diamond Clarity Grades


Internally Flawless


Very Very Small Imperfection


Small Imperfection



Carat: The weight of a diamond is measured in carats – 1 carat = 0.2 gram

Because of the high value of the stone, a carat is divided into tiny parts called points.

In 1 carat, there are 100 points, each 0.01 carat or 200 half-points, each 0.005 carat

Cut: The type of cut of a diamond depends on its size – the bigger the diamond, the larger and deeper its surface for cutting. With a greater number of cuts, the diamond has a more gleaming look and its value increases accordingly.

Double Cut – A diamond with 57-58 facets, also called a Full Cut Diamond

Single Cut – A diamond with 27-28 facets

Rose Cut Diamonds

Description:  These were the first diamonds ever found in the mines. They were mined in India and set in traditional Indian jewelry. In recent years, this type of diamond has come back into use.

Shape: Flat, without depth

Cut: Flat upper surface and angular cuts around the sides

Mounting in Jewelry: Most diamonds are mounted in such a way that the lower part of the diamond is left open to enable penetration of light beams, thus creating reflection to enhance the color and shine of the stone. Due to the flat shape of rose-cut diamonds, these are mounted with the lower part enclosed. In order to create reflection of light, silver foil is placed between the gold and the diamond. As the light beams reach the silver foil and are reflected, the diamond shines.

Limitations: A rose-cut diamond should not come in contact with water (including shower, pool, sea). The reason for this is that this jewelry is hand-made and often, there are tiny cavities between the gold and the diamond. The cavities are not visible to the eye but water can penetrate within and spoil the shine of the silver foil.  When this happens, reflection of the light will be reduced and the diamond will appear opaque and spoiled, and will lose its quality and beauty.

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