![]() ![]() Poor polish can reduce the intensity of the diamond’s brightness. Graded in the same manner as symmetry, it can be ideal, excellent, very good, good, fair or poor, according to the GIA grading system. An ideal diamond has bright flashes across the surface.Īnother important feature is the polish of the precious stone. In flood lit rooms black and white sparkles can be seen, whereas the fire can be absent. These factors add to the scintillation of the diamond, which is the intense sparkling of the diamond, when it is moving. The angle of the rays escaping the diamond.The factors that affect the fire and brightness of the diamond are: A well cut diamond give off flashes of colours and fire, which are all results of the diamond cut and symmetry. Even though the white sheet returns more light, the chess board appears brighter due to the contrast. ![]() Imagine a chess board and a white sheet of paper. In order to create its instantly recognisable sparkle, more than just brightness is needed in a diamond. Due to certain areas acting like mirrors, less light is returned, resulting in less sparkle. This phenomenon is caused by diamonds that are either too shallow or too deep to refract light. Brilliance is also lost when the light enters and leaves the precious stone in the face-up direction. There are sometimes cases when the light leaks out, which results in less brilliance. The brighter the diamond, the more light is returned from its surface back to the observer. There are two factors that contribute to the brilliance of a diamond, and these are brightness and contrast. The almost hypnotising sparkle of a diamond is a unique feature of this precious stone. ![]()
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