Opals - facts fears and fairytales a lecture by Jeffery Bergman in reaction to Federico Barlocher the teaser was as follows:
ETHIOPIAN OPAL SCAMMERS BEWARE !!!!
Come learn the quick and simple “Einstein” aka “KISS” method of testing Ethiopian hydrophane opals for possible polymer resin treatment. The presentation will include a hands-on demonstration of rough and cut testing so that everyone can witness the method and results with their own eyes, and then go do their own testing at gem shows and opal dealer’s shops.
GIA's 96th Gemstone Gathering presents “Opal Treatments: Facts, Fears & Fairytales” by Jeffery Bergman - Founder of Primagem.
This is just a long clip from the event and not the whole event which revealed some wonderful opal secrets.
18 авг 2015