Four Cs

There is a verity of factors that will affect the value and quality of a diamond, those factors are called the Four Cs. The criteria for evaluating these precious gems stones are its color, carat, clarity and cut. At Le Lumiere, we want to guide you through the thought process of how these miracles of nature are hand-picked by our experts.


Diamonds that are chemically pure and of perfect structure are known to be perfectly transparent with no hue or color. However, the laws nature bestowed these gems with their own innate individuality through a wide variety of colors, just like people making no diamond identical to the other. A diamond’s color is assessed using an international grading scale system from D (colorless) to Z (Light Yellow). This system was established by the Gemological Institute of America(GIA) in 1940.


Although the laws of nature determines the characteristics of a diamond rough, but it’s through the hands of the expert cutters that brings out its true beauty and value. The cut of a diamond refers to the angle, shape and proportion of a diamond. A diamond’s cut grade is crucial as a well-cut diamond helps the diamond facets interact with its internal light, dispersing in through the top of the stone more intensely, releasing the maximum amount of fire and scintillation.A poorly cut diamond that is either too deep or too shallow will leak light through the bottom part of the stone, affecting its brilliance.

Carat Weight

Carat Weight (CT) is the metric unit to measure the mass of diamonds. This unit of measurement was derived from early gem traders using carob seeds as their counterweights. The standard equivalent of 1 carat is 0.2 grams or 100 points. In general, as the weight of the diamond increase, the value will increase exponentiallydue to its rarity and desirability.


A diamond clarity is defined by the existence and visual appearance of its internal characteristics (Inclusions) and surface defects (Blemishes). As perfectly imperfect these precious gems are, these inclusions and blemishescan only be seen undera 10x magnification Loupe. The diamond clarity grading ranges from flawless (FL) to included (I3) according to the GIA clarity grading system. The diamonds clarity grade may vary depending on the number, size, position, color and nature of the imperfection.

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