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about purity of diamonds
Posted Date: 08 Dec 2007 Resource Type: Articles/Knowledge Sharing Category: General
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Posted By: vijay Member Level: Gold
Rating:  Points: 3
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Clarity is an indication of a diamond's purity. It describes the degree to which a diamond is free of imperfections. The internal clarity grades range from internally flawless (IF) to fairly included (I3)or third pique (pronounced peekay) also written P3.
Flaws in diamonds may include external blemishes (from naturals and polishing defects) and internal inclusions. Most blemishes are so small as to have no affect on the beauty or brilliance of the stone. In nearly all diamonds, traces of minerals, gasses or other elements are trapped inside during the crystallization process. Inclusions look like tiny crystals, clouds, or feathers and are unique to every diamond. It is very rare to find a diamond that is completely clean to the expert eye using 10x magnification.
In a GIA certificate, plots are drawn using different colors of ink to distinguish between blemishes and inclusions: red for inclusions , green for blemishes , cavities, naturals, knots, laser drill holes, and black for extra facets .
The clarity of a diamond is graded by how many, how big and how visible the inclusions are, and where they are located within the diamond at 10x magnification. The fewer and smaller the inclusions, the more rare and valuable the diamond. It is very rare to find an internally flawless (IF) diamond.
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