Manhattan Chapter of the GIA Alumni
Manhattan Chapter of the GIA Alumni


 Due to the virus pandemic concerns, we will postpone the April and May meetings. Stay tuned.

Please stay healthy and wash your hands and your microscopes!


The Gemologists of the GIA NY Gem Identification Department present:


Overview and Update on the Heat Treatment of Sapphires
Augusto Castillo, GIA GG, FGA, Sr. Staff Gemologist
An overview on the latest heat treatment of sapphires and an update on the latest treatment of HPT (high pressure treatment).

Extended Applications of LA-ICP-MS in Gem Identification
Virginia Schneider, FGA, Analytics Technician
The LA-ICP-MS “Laser Ablation Inductively Coupled Plasma Mass Spectrometry” analysis application will be presented. This special tool is essential in the determination of country of origin of several gems and will be explained further.

 Alexandrite Country of Origin Determination
Tyler Smith, GIA GG, Staff Gemologist
Alexandrite origin determination is one of the most recent gemstones that GIA is able to accurately disclose its country of origin.


DATE: Tuesday, April 21st, 2020


TIME: 5-6 PM Sandwiches & Sodas 
             6-8 PM Lecture

 PLACE: GIA New York Education, 50 West 47th St. (between 5th and 6th Avenues), 8th Floor


COST:  $30 via Eventbrite. GIA Alumni and Gem-A Members Only!  Limited to 50.  Prepaid Only!  No walk-ins!     As a courtesy to our alumni and the speakers there will be no admittance after 6 PM. If you are not on the security list by the RSVP date of April 14th, you cannot attend. This is 7 days before the event!! All attendees must bring their government issue identification (drivers license or passport) to pick up their access card at the building lobby security post area with no exception.  Please come half hour early due to security protocols.


RSVP: Reservations must be in by Monday,April 14th, 2020

             Reserve through Eventbrite (click here)

Questions: Contact Gail B. Levine, GIA GG,   718.897.7305

                    or Merle S. Koblenz, GIA GG,    860.927.0179


The chapter thanks Heena Shah for her raffle donation. It contributed toward the 2020 effort for the Eunice Miles Scholarship Fund.

Calendar of events and more on the Manhattan Chapter’s website!


  • If anyone would like to donate something to the Eunice Miles Scholarship Fund raffle, please let us know. It is tax deductible!
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