(Closed) HCA tool for moissanite

posted 3 years ago in Rings
Post # 2
5158 posts
Bee Keeper
  • Wedding: January 2010

There is no consumer tool for moissanite, and it does not make any sense to use the HCA for it as moissanite has different properties and needs different angles than a diamond for optimal performance. The HCA was basically designed for GIA graded stones (though you can use on others) to eliminate GIA XXX diamonds that aren’t so excellent. It is not meant for selection, or other types of cuts other than Round Brilliant, or other types of stones like moissanites, sapphires, etc.

H&As are actually a little less brilliant (and also have less “sparkle”) than F1s because the cut is not optimal for moissanite. This is why they are rated as Very Good, not Excellent, for Brilliance and “Sparkle”. This does not bother me as I do not like the usual Round Brilliant cut for moissanite at all (I have H&As, and have had many classic OEC moissanites) and I find they actually are far more comparable to my diamonds in performance. But if you want maximum brilliance and sparkle, an F1 is a better choice.

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