Rob Bates was spot on. There is no easy answer. There are good gem testing laboratories and they good a good job detecting treatments/synthetics, and even help recover stolen goods. We are living in interesting times.
Useful links:
http://www.jckonline.com/1999/07/01/going-cert-less
http://www.jckonline.com/2011/12/21/why-jewelers-are-doing-their-own-diamond-grading
http://www.jckonline.com/blog/Cutting_Remarks/16050-De_Beers_Gets_Into_the_Lab_Business.php
http://www.jckonline.com/blogs/cutting-remarks/2011/06/08/vegas-blogging-problem-diamond-certs
Discover P.J. Joseph's blog, your guide to colored gemstones, diamonds, watches, jewelry, art, design, luxury hotels, food, travel, and more. Based in South Asia, P.J. is a gemstone analyst, writer, and responsible foodie featured on Al Jazeera, BBC, CNN, and CNBC. Disclosure: All images are digitally created for educational and illustrative purposes. Portions of the blog were human-written and refined with AI to support educational goals.
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