How to rank diamond clarity grades?

The clarity of diamonds is usually graded using a 10x magnifying glass to classify the internal and surface flaws of the diamond and its impact on brilliance. The clarity level of unmounted diamonds is subdivided into LC, VVS1, VVS2, VS1, VS2, SI1, SI2, P1, P2, P3*** 10 levels. Mounted diamonds are divided into five levels: excellent, very good, good, and better. P-level diamonds are also called I-level diamonds. Diamonds below P level are generally not used as gemstones, so they are generally only classified into P level, and are no longer divided into P1/P2/P3.

Internationally commonly used are IF, VVS, VS, SI, and P. The explanation is:

(1) IF is perfect and flawless, domestically it is LC, that is, no flaws can be seen under a ten-fold magnifying glass - everyone remembers: it is impossible to give this level to domestic inlaid diamond grading .

(2) VVS is subdivided into VVS1 and VVS2. V=Very, VVS - very very small inclusions - professional diamond graders can also see very small inclusions under a 10x magnifying glass. Hard-to-find pinpoint inclusions.

(3) VS is subdivided into VS1 and VS2. VS grade contains larger inclusions than VVS, which is more difficult for professional diamond graders to detect under 10x microscope. VS2 grade contains more inclusions than VS1. VS grade is the dividing line for high-quality diamonds.

(4) SI is subdivided into SI1 and SI2, both of which are small defects. SI1 defects are easily visible under a ten-fold magnifying glass. If there are many defects, they are classified into SI2; - SI level cannot be seen by the naked eye. Inclusions. Therefore, when purchasing diamonds, the naked eye cannot tell the difference if they are above the SI level.