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ETGMS hopes you enjoy the following presentation. Please note that none of the materials in the 'DIAMONDS' power point presentation can be reproduced without written permission from the ETGMS Webmaster - click here to contact Webmaster.  

'DIAMONDS' is created by Richard D. Armstrong, Certified Senior Member (NAJA ASG, GG, GP, AJP)
Lonestar Gemological Laboratory, LLC, AGA Certified Gem Lab #51, CEO Gemologist/Appraiser

Page updated 10/30/2020