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GSA Connects 2021 in Portland, Oregon

Session No. 190
Tuesday, 12 October 2021: 2:30 PM-6:30 PM
Exhibit Hall A (Oregon Convention Center)

T106. Gemological Research in the 21st Century—Gem Minerals and Localities (Posters)

Gemological Institute of America; Mineralogical Society of America; Society of Economic Geologists

Authors will be present from 4 to 6 PM.

 

Paper #
Booth #
190-1
83
A QUANTITATIVE DESCRIPTION OF THE CAUSES OF COLOR IN CORUNDUM
STONE-SUNDBERG, Jennifer, Education, Gemological Institute of America, Portland, OR 97221, DUBINSKY, Emily, San Francisco, CA 94129 and EMMETT, John L., Brush Prairie, WA 98606
190-2
84
DISCOVERY OF DIAMONDS THAT CHANGE COLOR AT LIQUID NITROGEN TEMPERATURES
PERSAUD, Stephanie, Gemological Institute of America, 50 W 47th Street, New York City, NY 10036 and JOHNSON, Paul, Gemological Institute of America, New York, NY 10036
190-3
85
SPECTROSCOPIC CHARACTERISTICS OF HEATED BLUE/VIOLET SPINELS: UV-VIS-NIR AND PHOTOLUMINESCENCE STUDY
SOONTHORNTANTIKUL, Wasura1, WEERAMONGKHONLERT, Vararut1 and PALKE, Aaron C.2, (1)Gemological Institute of America (GIA), 968 U-Chu-Liang Building, 6th&10th floors, Rama IV Road, Silom, Bangrak, Bangkok, 10500, Thailand, (2)Gemological Institute of America (GIA), 5345 Armada Dr, Carlsbad, CA 92008
190-4
86
FANCY LIGHT BLUE DIAMONDS – A NEW TREATMENT
JOHNSON, Paul, Gemological Institute of America, New York, NY 10036
Handouts
  • Poster GSA 2021-paul.pdf (405.4 kB)
    • 190-5
    87
    GEM MINERAL LOCALITIES AT THE TIME OF THE TAJ MAHAL
    DIRLAM, Dona Mary1, WELDON, Robert2, ROGERS, Chris L.2 and WELDON, Orasa3, (1)Carlsbad, CA 92008, (2)Gemological Institute of America, 5345 Armada Drive, Carlsbad, CA 92008, (3)OW Design, Carlsbad, CA 92010
    190-6
    88
    Withdrawn
    190-7
    89
    COMPARISON OF SPECTROSCOPIC FEATURES IN TYPE IIA AND IA NATURAL PINK DIAMONDS
    EATON-MAGANA, Sally1, ARDON, Troy1, MCELHENNY, Garrett R.2 and BREEDING, Christopher M.3, (1)Research, GIA, 5355 Armada Dr, Carlsbad, CA 92008, (2)Gemological Institute of America, GIA, 5355 Armada Dr., Carlsbad, CA 92008, (3)Gemological Institute of America, 5355 Armada Drive, Carlsbad, CA 92008
    190-8
    90
    EXPLORATION IMPLICATIONS OF ISOTOPICALLY HEAVY IRON IN LARGE GEM TYPE IIA DIAMONDS
    SMITH, Evan, Gemological Institute of America, 50 W 47th Street, New York, NY 10036
    190-9
    91
    CHROMOPHORES OF PARAÍBA TOURMALINE IN VISIBLE RED AND NEAR INFRARED LIGHTS: CASE STUDY
    KATSURADA, Yusuke1, PALKE, Aaron C.2, SUN, Ziyin1 and VERTRIEST, Wim3, (1)Gemological Institute of America (GIA), 5345 Armada Dr, Carlsbad, NY 92008, (2)Gemological Institute of America, 5345 Armada Dr., Carlsbad, NY 92008, (3)Bangrak, GIA, U Chu Liang Building, 10th Floor, 968 Rama IV Road, Bangrak, Bangkok 10500, THAILAND
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