Monday, February 22, 2010
Diamond clarity is a quality of diamonds related to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects called blemishes. Clarity is the important one of the four Cs of diamond grading, the others being carat, color, and cut. Inclusions may either be crystals of a foreign material or another diamond crystal, or structural imperfections such as tiny cracks that can appear whitish or cloudy. Factors such as the number, size, color, relative location, orientation, and visibility of inclusions can affect the relative clarity of a diamond. A clarity grade is assigned based on the overall appearance of the stone less than 10x magnification.
Most inclusions that are present in gem-quality diamonds donot affect the diamonds' performance or structural integrity. However, large clouds can in turn affect a diamond's ability to transmit and scatter light. Large cracks that are close to or breaking the surface may reduce a diamond's resistance to fracture.
Usually diamonds with higher clarity grades are more valued, with the exceedingly rare "flawless" graded diamond fetching the highest price. Minor inclusions or blemishes are useful, as they can also be used as unique identifying marks analogous to fingerprints. In addition, as synthetic diamond technology improves and distinguishing between natural and synthetic diamonds becomes very difficult, inclusions or blemishes can be used as proof of natural origin.Labels: Clarity of Diamonds
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