Get ready for Tucson! Join us for the 2026 AGA Gemological Conference & Gala.

Join us for the 2026 AGA Gemological Conference & Gala!

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Paul Cassarino
, 
GG, FGA, DGA
Accredited Senior Gemologist
Cheryl Castner
, 
Independent Appraiser, Graduate Gemologist, GIA; Accredited Senior Gemologist AGA; Registered Master Valuer
Accredited Senior Gemologist
Cape Elizabeth
, 
ME
United States
Kevin Castro
, 
GG, ASG
Accredited Senior Gemologist
Jane Chaikowsky
, 
GIA GG, ASA MGA, CSM (NAJA)
Accredited Senior Gemologist
Bethlehem
, 
PA
United States
Henry Chaplin
Accredited Senior Gemologist
Salvatore Ciulla
, 
GG
Accredited Senior Gemologist
Palermo
, 
Sicilia
Italia
Christopher Clark
, 
GG, FGA, ASG
Accredited Senior Gemologist
Littleton
, 
CO
United States
Katy Clites
Accredited Senior Gemologist
John Codianni
Accredited Senior Gemologist
Neil Cohen
Accredited Senior Gemologist
Jo Ellen Cole
Accredited Senior Gemologist
Robert Connelly
Accredited Senior Gemologist
Lori Coogan
, 
GG
Accredited Senior Gemologist
Hingham
, 
MA
United States
Lucy Cook
Accredited Senior Gemologist
Marie Hélène Corbin
, 
FGA
Accredited Senior Gemologist
Michael Cowing
Accredited Senior Gemologist
Luca D'Angiola
, 
G.G.
Accredited Senior Gemologist
Anacapri
, 
Campania
Italia
Gina D'Onofrio
, 
FGAA, FGA, MGA-ASA, CMA-NAJA, AM-ISA
Accredited Senior Gemologist
Beverly Hills
, 
CA
United States
Heather Davis
Accredited Senior Gemologist
Arthur DeMello
Accredited Senior Gemologist