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- Apr 25, 2014
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AGS and GIA are both fine.
It is my understanding that GIA have fairly loose criteria to hit triple-Excellent (I believe 60% of stones on the market are 3X...) whereas AGS are stricter because they rely on actual ray-tracing to grade light return.
There are still some AGS000 dogs on the extremes of the range, but generally I would say you are safer with AGS000 than GIAXXX.
It is my understanding that GIA have fairly loose criteria to hit triple-Excellent (I believe 60% of stones on the market are 3X...) whereas AGS are stricter because they rely on actual ray-tracing to grade light return.
There are still some AGS000 dogs on the extremes of the range, but generally I would say you are safer with AGS000 than GIAXXX.