The clarity of diamond is a qualitative metric that is grades the visual appearance of each diamond in regards to blemishes, black spots inclusions, etc that can be overlooked by naked eye. This is an important parameter that can impact a diamond’s value.
To determine the clarity of diamonds, our experts will be required to examine the appearance of diamond with a high specifications’ microscope with 10X magnification and eye visibility with power lens. The diamond clarity is judged on a scale of Flawless to imperfect scale on factors like internal inclusions, external blemishes, etc.
Geological Institute of India has charted out five factors that play a significant role in Diamond grading.
- Size – The size of the inclusion is important because it affects gradings
- Nature – The nature of the inclusion are blemishes on the surface or inside the diamond affecting its grading.
- Number – The number of inclusions/blemishes on the diamond affect the grading standard.
- Location – The location of an inclusions / blemishes refers to where on the diamond any such spots are located. The proximity of the inclusion if near the centre affects the clarity more than close to the girdle. If any inclusions are near pavilions or facets where it can be reflected then it affects the clarity impact.
- Relief of the inclusions – The relief is referring to how noticeable the inclusion is in contrast to the host diamond. The higher the relief, it can affect diamond grading.
Geological Institute of India prepares a clarity plot to show the locations and types of imperfections in a diamond. Only clean eye diamond doesn’t mean it is a valuable product. Our institute has charted out a clarity grade system to determine the diamond value under the 10x magnification.
- Flawless (FL) No inclusions and no blemishes visible
- Internally Flawless (IF) No inclusions visible
- Very, Very Slightly Included (VVS1 or VVS2) Inclusions so slight they are difficult for a skilled grader to see.
- Very Slightly Included (VS1 or VS2) Inclusions are observed with effort and precision.
- Slightly Included (SI1 or SI2) Inclusions are noticeable
- Included (I1, I2, and I3) Inclusions may affect transparency and brilliance