J jferrara75 Rough_Rock Joined Dec 16, 2003 Messages 7 Dec 17, 2003 #1 For a round stone, what defines symmetry? Is it the min & max diameter? or something else? A comnination? What should I be looking for?
For a round stone, what defines symmetry? Is it the min & max diameter? or something else? A comnination? What should I be looking for?
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P pricescope Guest Dec 17, 2003 #2 This article is pretty heavy reading but you can find some info on different approaches to grading of symmetry by GIA, HRD and Russians.
This article is pretty heavy reading but you can find some info on different approaches to grading of symmetry by GIA, HRD and Russians.