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Pearl size,volume versus diameter
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=70&t=19386
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Author:  thomasset [ Sun Feb 16, 2014 6:08 am ]
Post subject:  Pearl size,volume versus diameter

http://blog.pearlparadise.com/2014/01/p ... -diameter/

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