In two places in its guidelines, the phrase "...corrected magnifier at 10-power, with adequate illumination, by a person skilled in gemstone grading..." is used.
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The standard magnification for diamond clarity grading under FTC guidelines is 10x. This level of magnification allows gemologists to accurately assess the internal characteristics of a diamond to determine its clarity grade.
The highest grade for diamond clarity is "Flawless" (FL). This means the diamond has no internal or external imperfections when viewed under 10x magnification.
AAA clarity is not a recognized rating for diamonds. The standard clarity scale for diamonds ranges from Flawless (no inclusions) to Included (visible inclusions). AAA is not a term used in the diamond industry to describe clarity.
The clarity of a diamond is determined by examining the presence of inclusions (internal flaws) and blemishes (external flaws) under 10x magnification. The clarity is then graded on a scale ranging from Flawless (no inclusions or blemishes) to Included (visible inclusions). A diamond with fewer inclusions or blemishes is considered to have higher clarity and therefore more valuable.
In diamond grading, "J" clarity refers to diamonds that have noticeable inclusions when viewed under 10x magnification. These inclusions may affect the diamond's brilliance and transparency but might not be visible to the naked eye. J clarity diamonds are considered lower on the clarity scale, but they can still be a good choice for those looking to balance quality and budget.
VVS1 stands for "Very Very Slightly Included 1," which is a grade on the diamond clarity scale. Diamonds in this category have minute inclusions that are difficult to see even under 10x magnification, making them very high quality and highly valued.