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What defines symmetry

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jferrara75

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