---

Activity

2022

• CLASSIFICATION OF GEM MATERIALS USING MACHINE LEARNING
  T225 Gemological Research in the Twenty-First Century—Gem Minerals and Localities
  Wednesday, 12 October 2022

  8:00 AM - 12:00 PM

  503

---

2021

• COMPARISON OF SPECTROSCOPIC FEATURES IN TYPE IIA AND IA NATURAL PINK DIAMONDS
  T190 Gemological Research in the 21st Century—Gem Minerals and Localities (Posters)
  Tuesday, 12 October 2021

  2:30 PM - 6:30 PM

  Exhibit Hall A
• EXAMINING THE DEFECTS IN NATURALLY IRRADIATED GREEN DIAMONDS: A STATISTICAL APPROACH TO SPECTROSCOPY
  T107 Gemological Research in the 21st Century—Gem Minerals and Localities
  Monday, 11 October 2021

  1:30 PM - 5:30 PM

  A107–A109

---

2019

• THE CAUSE OF COLOR IN ORANGE GEM DIAMONDS
  T288 Gemological Research in the 21st Century—Gem Minerals and Localities
  Wednesday, 25 September 2019

  1:30 PM - 5:30 PM

  Room 132ABC, North Building
• NATURAL RADIATION STAINS IN DIAMONDS: RATES OF COLOR CHANGE
  T288 Gemological Research in the 21st Century—Gem Minerals and Localities
  Wednesday, 25 September 2019

  1:30 PM - 5:30 PM

  Room 132ABC, North Building

---

2018

• NATURAL COLOR IN GEM DIAMONDS: FROM THE LOWER MANTLE TO THE UPPERMOST CRUST
  T282 Gemological Research in the Twenty-First Century—Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals
  Wednesday, 7 November 2018

  1:30 PM - 5:30 PM

  Room 145

---

2017

• OBSERVATIONS ON MAGNESITE INCLUSIONS IN NATURAL SILICON-VACANCY GEM DIAMONDS
  T172 Gemological Research in the 21st Century—Characterization, Exploration, and Geological Significance of Diamonds and other Gem Minerals (Posters)
  Monday, 23 October 2017

  9:00 AM - 6:30 PM

  Halls 4EF

---

2016

• THE ART AND SCIENCE OF DIAMOND FLUORESCENCE: WHAT IT TELLS US ABOUT THE GROWTH HISTORY OF NATURAL AND SYNTHETIC GEM DIAMONDS
  T136 Gemological Research in the Twenty-First Century: Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals
  Monday, 26 September 2016

  1:30 PM - 5:30 PM

  Room 207

---

2015

• A COMPARISON OF NATURAL AND LABORATORY-INDUCED RADIATION DAMAGE IN GEM DIAMOND
  T16 Radiation Effects, Mineralogy, and Materials Science of Actinides I: In Honor of Rodney C. Ewing, 2015 Roebling Medalist
  Sunday, 1 November 2015

  8:00 AM - 12:00 PM

  Room 317

---

2014

• A SPECTROSCOPIC LOOK AT GREEN AND BLUE GEM DIAMONDS COLORED BY ARTIFICIAL IRRADIATION TREATMENT
  T104 Gemological Research in the 21st Century: Exploration, Geology, and Characterization of Diamonds and Other Gem Minerals I
  Monday, 20 October 2014

  8:00 AM - 12:00 PM

  202/203
• TRACE ELEMENT CHEMISTRY OF DEMANTOID VARIETY ANDRADITE GARNET
  T167 Gemological Research in the 21st Century: Exploration, Geology, and Characterization of Diamonds and Other Gem Minerals II
  Monday, 20 October 2014

  1:00 PM - 5:00 PM

  202/203
• CARBON ISOTOPE ANALYSIS OF CVD SYNTHETIC GEM DIAMONDS
  T104 Gemological Research in the 21st Century: Exploration, Geology, and Characterization of Diamonds and Other Gem Minerals I
  Monday, 20 October 2014

  8:00 AM - 12:00 PM

  202/203

---

2013

• IDENTIFICATION OF GREEN COLORED GEM DIAMONDS: AN ON-GOING CHALLENGE
  T218 Gemological Research in the 21st Century: Characterizing Diamonds and other Gem Minerals
  Tuesday, 29 October 2013

  8:00 AM - 12:00 PM

  Room 205