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The Amazing Natural Diamond Story
Wednesday September 16, 2026 10:15am - 12:15pm EDT
Royal Dublin B
Space for this Hands-on GIA session is limited to 24 participants and is first-come, first-served.

Many jewelers work with diamonds on almost a daily basis, and they can lose sight of how remarkable these natural gemstones are. This presentation will discuss the geological conditions of diamond formation that give rise to their rarity, and the distinctive features which provide positive evidence of their natural origin.
Speakers
avatar for James Shigley, Ph.D.

James Shigley, Ph.D.

Distinguished Research Fellow, GIA
Dr. James Shigley is a distinguished research fellow at the Gemological Institute of America in Carlsbad, California.  Prior to joining GIA in 1982, he studied geology as an undergraduate at the University of California Berkeley and later received his doctorate in geology from Stanford... Read More →
avatar for Brenda Harwick

Brenda Harwick

Senior Manager, On Campus and Lab Gemology Instruction, GIA
A specialist in both the theory and practice of diamond grading, colored stone grading, and gem identification, Brenda Harwick’s expertise comes from a ten-year background in retail and gemological training. Brenda earned her Graduate Gemologist diploma, and in 1999 she was hired... Read More →
Wednesday September 16, 2026 10:15am - 12:15pm EDT
Royal Dublin B
  Track, GIA Hands-On

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