Clarity: CLARITY
Quality from high to low:
FL IF VVS1 VVS2 VS1 VS2 SI1 SI2 SI3 P1 P2 P3
Roughly divided into five major LC (FL, IF) VVS VS SI I (P), common in retail stores
Carefully observe the cleanliness of the diamond under a ten times microscope. The more flaws and the more obvious the location, the worse the quality and the corresponding lower price
LC grade means no flaws can be seen under the ten times lens
VVS is very difficult to see flaws under a tenx lens
VS is difficult to see flaws under a tenx lens
SI can see flaws under a tenx lens
Generally, LC grade diamonds rarely appear in the retail market.