Insightful information.
Useful links:
http://www.gem-a.com/publications/journal-of-gemmology/issues-2008-to-date/schmetzer-2012.aspx
http://www.creativecrystal.com
http://www.chatham.com/News_Archive.php
http://www.gia.edu/research-resources/gems-gemology/back-issue-archive/winter-1972.pdf
http://www.palagems.com/gem_news_2011_v2.php#neider
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