Diamond Clarity Grades

When determining the clarity grading of a diamond, the Gemological Institute of America (GIA) well look at a number of different factors. They magnify all diamonds by 10x and then they look at where the blemishes and inclusions are positioned, as well as their colour, reflectivity, size, and the number of them. 

Diamond grades:

  • (FL) Flawless  – These diamonds do not have any inclusions or blemishes, even when magnified. These diamonds are extremely rare; there is approximately one flawless diamond in every 5,000 diamonds.
  • (IF) Internally flawless – These diamonds are very similar to those graded Flawless. The differences can only be spotted under magnification by a skilled grader.
  • (VVS1 and VVS2) Very, very slightly included – Inclusions can be spotted under 10x magnification by a skilled grader with VVS1 and VVS2. In regards to the latter, these inclusions are often visible from the crown, whereas with VVS1 they are visible from the pavilion.
  • (VS1 and VS2) Very slightly included – These inclusions are minor but very visible under magnification. They will usually not be visible to the naked eye.
  • (SI1 and SI2) Slightly included – With SI1 and SI2, it is highly likely that the inclusions will be visible under close inspection, even to the untrained eye.
  • (I1, I2, and I3) Included – Last but not least, everyone can see blemishes and inclusions on a diamond ranked I1. In regards to I2 and I3, the inclusions will be obvious and pronounced, and they can actually be detrimental to the diamond's durability.