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Diamond inclusions are among the major factors influencing the appearance of a diamond. An inclusion may have a visual impact on a finished diamond. There are various types of inclusions - knot, metallic, needle, cloud, feather, chip, graining, crystal inclusions etc. Diamond cutters make every effort to cut a stone so that inclusions are not visible from the table of the finished diamond.

Diamond Blemishes are external flaws that appear on its surface. These flaws are mostly caused by improper cutting process or due to mishandling of diamond and are not present in all natural diamonds. Some of the diamond blemishes are naturals, abrasion, burn marks, nicks, pit, knot lines, rough girdle and scratches. Blemishes affect the clarity of diamond which in turn lowers the value of the diamond.