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Activity

2023

• THE “GOLDILOCKS” CHEMICAL ZONE FOR VIVID V- CR-BEARING GEM TOURMALINES AND THE EMBEDDED PARAGENETIC INFORMATION
  T18 A Session in Honor of Georges Calas, Professor Emeritus, Sorbonne Université, Paris, France, and 2023 Roebling Medalist of the Mineralogical Society of America I
  Sunday, 15 October 2023

  8:00 AM - 12:00 PM

  315 / 316

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2022

• CR3+ PHOTOLUMINESCENCE AND TRACE ELEMENT CORRELATIONS IN METAMORPHIC SAPPHIRE
  T225 Gemological Research in the Twenty-First Century—Gem Minerals and Localities
  Wednesday, 12 October 2022

  8:00 AM - 12:00 PM

  503
• CU AND FE CONTRIBUTIONS TO THE COLOR OF CUPRIAN TOURMALINE: CHALLENGE FOR PARAÍBA NAME JUDGEMENT
  T225 Gemological Research in the Twenty-First Century—Gem Minerals and Localities
  Wednesday, 12 October 2022

  8:00 AM - 12:00 PM

  503
• SPECIAL COLORS AND OPTICAL EFFECTS OF OREGON SUNSTONE
  T225 Gemological Research in the Twenty-First Century—Gem Minerals and Localities
  Wednesday, 12 October 2022

  8:00 AM - 12:00 PM

  503

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2021

• CHROMOPHORES OF PARAÍBA TOURMALINE IN VISIBLE RED AND NEAR INFRARED LIGHTS: CASE STUDY
  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
• DIFFUSION MECHANISM OF CU IN THE GEM-QUALITY LABRADORITE FELDSPAR
  T107 Gemological Research in the 21st Century—Gem Minerals and Localities
  Monday, 11 October 2021

  1:30 PM - 5:30 PM

  A107–A109
• HOW TO CALCULATE COLOR FROM SPECTRA OF UNIAXIAL GEMSTONES
  T107 Gemological Research in the 21st Century—Gem Minerals and Localities
  Monday, 11 October 2021

  1:30 PM - 5:30 PM

  A107–A109
• DISORDERED DOLOMITE FOUND IN THE CENTER OF A NATURAL PEARL FROM A CASSIS SP. MOLLUSK
  T107 Gemological Research in the 21st Century—Gem Minerals and Localities
  Monday, 11 October 2021

  1:30 PM - 5:30 PM

  A107–A109

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2020

• IRON OXIDE INCLUSIONS IN THE RAINBOW LATTICE SUNSTONE FROM AUSTRALIA
  T208 Gemological Research in the 21st Century: Gem Minerals and Localities
  Thursday, 29 October 2020

  1:30 PM - 5:30 PM

  Meeting Rooms

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2019

• DISCOVERY OF A POSSIBLE NEW GEM MINERAL OF THE BERYL FAMILY FROM THE MOGOK STONE TRACT, MYANMAR
  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

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2018

• METASOMATIC ORIGIN FOR TOURMALINE-SAPPHIRE-PHLOGOPITE ROCKS OF THE BADAKHSHAN PROVINCE, NE AFGHANISTAN
  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
• ISOLATING CHROMOPHORES IN PYRALSPITE GARNET – QUANTITATIVE DEFINITION OF STRENGTH OF CHROMOPHORES AND THEIR IMPACT ON COLOR CHANGE
  T110 Gemological Research in the Twenty-First Century—Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals (Posters)
  Monday, 5 November 2018

  9:00 AM - 6:30 PM

  Halls J-K

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2017

• BLUE-GREEN PYROPE-SPESSARINE GARNET WITHOUT A COLOR CHANGE PHENOMENON: THE ROLE OF VANADIUM IN THE COLOR OF GARNETS
  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
• MATRIX-MATCHED CORUNDUM STANDARDS FOR KEY TRACE ELEMENTS IN RUBY AND SAPPHIRE
  T20 Gemological Research in the 21st Century—Characterization, Exploration, and Geological Significance of Diamonds and other Gem Minerals
  Sunday, 22 October 2017

  8:00 AM - 12:00 PM

  Skagit 3