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The intricacies and risks of diamond-cutting
by Paul Slegers | Published  27/04/2006 | Diamond Grading
The final grading of AGS
To our astonishment, the grading of AGS seemed to have become a tad stricter than we were used to in the past. These were our results.

In colour, in stead of the predicted colour of 4.53, we received an average grade of 5.12, thus an average of H in stead of G-H. Generally, we have the experience that AGS gives a slightly better colour-grade than our estimate, and this difference is very surprising to us.

In clarity, we predicted a clarity of 6.21, and AGS graded the parcel at an average grade of 6.58. Normally, we are used to AGS grading clarity slightly stricter than our prediction, thus this does not surprise us at all.

However, where we generally get a somewhat stricter grade on clarity, and a slightly better grade on colour, we now got a stricter grade on both.

When looking at this dollar-wise, the picture becomes problematic. Before sending the stones to AGS, we estimated our return to be 94% of our original prediction. With the resulting AGS-grades, our return now is only 83% of our original prediction.

We had estimated to turn a profit of 15% on this parcel. Now, it turns out to be a loss of 5%.

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