Fashion Wear

The Clarity Grading Chart
The GIA, which is the largest and widely accepted gem laboratory in the world, uses a scale to grade the clearness of diamonds and the scale is as follows:
# FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2, I3

Notice how SI3 does not fall into any of the above categories. So where did this term originate from? The designation SI3 clearness has evolved to mean an eye clean I1 diamond. In other words, it can be considered a baritone SI2 or a broad I1 gemstone. The reason for trying to found such a grade is to avoid the marked price drop from SI2 to I1, making these diamonds more appealing to consumers. The EGL has adopted this clearness grade and the Report Diamond Report, or the Rap sheet for those in the know has included SI3 to it’s price list. Used widely by the indiscriminate and retail industry, this rap sheet is a most sure price programme for diamonds.

The Plot Thickens
However, the GIA and AGS do not discern this grade. If an SI3 diamond is taken to the GIA for analysis, one hundred percent of the time, they will ever call this diamond an I1. The theory is that SI3 is supposed to be a stone that faces up really well. It’s said to almost resemble an SI2 stone, but it may have receptor visible inclusions off to the side, near the edge of the girdle. And these inclusions that fall toward the outside of the stone can keep it from being graded an SI2 clarity. While every SI diamonds have inclusions, they are very small and a jeweler’s loupe or microscope will be needed to wager them. However, SI2 clearness diamonds are exempted from this rule. From the top down, when looking straight into the stone, there will be no receptor visible inclusions, they are microscopic. But from the side or bottom view, SI2 clearness stones can have receptor visible inclusions in them, though they are usually tiny and hard to find. Provided that the top down view is receptor clean, GIA will ever reason them as SI2. If the inclusions can be seen with the unclothed receptor from the top view, then it is considered I1. This is why the GIA doesn’t acknowledge the SI3 concept. According to them, a diamond either has receptor visible inclusions, or it doesn’t. I1 clearness translates to a stone that has flaws that can be seen with the unclothed eye, and therefor, GIA does not wager fit to change their long standing and universally accepted diamond grading system.

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