AGTA GTC Seminars
Upcoming Dates |
AGTA GTC seminars are designed to help dealers, appraisers, jewelers and collectors keep pace with the latest ruby and sapphire treatment developments. These intense one-day seminars feature:
- Limited class size (maximum six participants)
- Hands-on sessions with actual gemstone samples
- Expert instruction from AGTA GTC gemologists
Sessions begin with a brief review of the major treatment technologies and the AGTA GTC's Gemstone Report nomenclature. These are followed by laboratory session where participant personally examine samples, concentrating on separation of untreated gemstones (NTE) from the following treated gemstones:
- Heat (TE)
- Flux healing (TE1 to TE5)
- Glass cavity filling (C1 to C3)
- Glass fracture filling (F1 to F3)
- Oils, dyes and irradiation
When and where
- Monday, May 19, 2008, at the New York AGTA GTC
Morning: 9:30 a.m. to 12:30 p.m.; Lunch: 1 hour; Afternoon: 1:30 to 4:30 p.m. - Cost: $800 per person
To register, or if you are interested in participating in future seminars, please contact Dr. Lore Kiefert at 212-752-1717 or email at lkiefert@agta-gtc.org. Special arrangements can be made for groups of six participants.
What others have said... "I recently participated in one of the greatest classes of my career on December 3, 2007. I learned a tremendous amount of useful information on corundum. Having attended seminars offered by other associations, I now know AGTA has the highest standards. I appreciate the honor of attending this class and look forward to more. Thank you!" Deborah A. Villepigue "Education is the best weapon against fraud. This class is a must for any gem dealer who wants to know what he or she is buying." Barbara Lawrence |
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Left to right: Cindy Wolfsohn, Thomas Edwards, Teri Newman Brossmer, the AGTA GTC's Richard Hughes, Courtney Balzan and Charles Carmona view images of treated corundums as a prelude to lab work during the November 16, 2007 seminar in Carlsbad, CA. |
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Richard Hughes (center right) discusses the finer points of the spectroscope with Courtney Balzan (left) and Charles Carmona (far right) during the November 16, 2007 seminar. |


