Basically, the 4C grades aren’t as clear-cut as they appear on certificates; a whole spectrum of quality exists between the grades, and resulting variations can drastically impact the diamond’s value. For instance, VS2 diamonds can be classified as VS2+, VS2 even, or VS2- by experienced gemmologists. It is not uncommon to find VS2 stones that are borderline VS1, which our gemologist classifies as VS2+. However, we cannot simply list it as VS2+ on our website. The accompanying report from IGI, GIA, or GCAL will only list it as a VS2, thereby causing confusion if we contradict or don’t match their official reports.
In the same vein, there are diamonds that are at the lower end of the, for example, VS1 spectrum that our gemmologist internally classifies as VS2+. These borderline VS2 diamonds, however, are listed in their certificates as VS1, depriving customers of any nuance in their purchasing decision. Customers will end up paying a premium for the VS1 classification to buy diamonds that are, in essence, VS2+. Similarly, the colour grade is internally subdivided by our gemmologists into + (plus), even, and – (minus). An E- colour diamond will command a higher premium over an F+ colour diamond, even though both are almost the same in colour.