GSA Annual Meeting in Phoenix, Arizona, USA - 2019

Session No. 288
Wednesday, 25 September 2019: 1:30 PM-5:30 PM
Room 132ABC, North Building (Phoenix Convention Center)

T30. Gemological Research in the 21st Century—Gem Minerals and Localities

Gemological Institute of America

 

Caroline Nelms, James E. Shigley, Wuyi Wang, Barbara L. Dutrow and John W. Valley, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1:45 PM
FRAGMENTS SAMPLED AT EARTH'S TRANSITION ZONE AND LOWER MANTLE BOUNDARY BY A TYPE IAB DIAMOND
GU, Tingting1, PAMATO, Martha G.2, NOVELLA, Davide3, NESTOLA, Fabrizio2, ALVARO, Matteo4, FOURNELLE, John H.5 and WANG, Wuyi1, (1)Gemological Institute of America, 50 west 47 Street, New York, NY 10036, (2)Department of Geosciences, University of Padova, Padova, 35131, Italy, (3)Department of Earth Sciences, University of Cambridge, Cambridge, CB3 0EZ, United Kingdom, (4)Department of Earth and Environmental Sciences, University of Pavia, Pavia, VA 27100, Italy, (5)Department of Geoscience, University of Wisconsin, Madison, WI 53706
2:00 PM
NATURAL RADIATION STAINS IN DIAMONDS: RATES OF COLOR CHANGE
EATON-MAGANA, Sally, Gemological Institute of America, Carlsbad, CA 92653 and BREEDING, Christopher M., Gemological Institute of America, 5355 Armada Drive, Carlsbad, CA 92008
2:15 PM
DIAMONDS FROM THE LAST GREAT WILD PLACE (GUYANA, SOUTH AMERICA)
BASSOO Jr., Roy and BEFUS, Kenneth, Geology, Baylor University, One Bear Place #97354, Waco, TX 76798
2:30 PM
THE NEW NICKEL SULFIDE MINERAL CROWNINGSHIELDITE FOUND WITHIN A SUPERDEEP DIAMOND FROM LETSENG
SMITH, Evan M.1, NESTOLA, Fabrizio2, PASQUALETTO, Leonardo2, ZORZI, Federico2, SECCO, Luciano2 and WANG, Wuyi1, (1)Gemological Institute of America, 50 W 47th Street, New York, NY 10036, (2)Department of Geosciences, University of Padova, Padova, 35131, Italy
2:45 PM
THE CAUSE OF COLOR IN ORANGE GEM DIAMONDS
BREEDING, Christopher M., Gemological Institute of America, 5355 Armada Drive, Carlsbad, CA 92008
3:00 PM
ANALYSIS OF 480 NM BAND IN A BI-COLORED DIAMOND
MOE, Kyaw Soe, Gemological Institute of America, 50 W 47th Street, New York, NY 10036 and WANG, Wuyi, Gemological Institute of America, 50 west 47 Street, New York, NY 10036
 
3:15 PM
Break
3:30 PM
REFINING SAPPHIRE GENESIS MODELS FOR YOGO GULCH, MONTANA, AND BINGHAM CANYON, UTAH: EVIDENCE FROM TRACE ELEMENTS, MELT INCLUSIONS, AND OXYGEN ISOTOPE RATIOS
MARTIN, Samuel G.1, KEITH, Jeffrey D.1, PALKE, Aaron C.2, VALLEY, John W.3, TURNIER, Rachelle B.3, SHIGLEY, James E.4, CHADBURN, Ryan1 and MARTIN, Alec J.1, (1)Department of Geological Sciences, Brigham Young University, Provo, UT 84602, (2)Gemological Institute of America (GIA), 5355 Armada Dr, Carlsbad, CA 92008, (3)Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton Street, Madison, WI 53706, (4)Research Department, Gemological Institute of America, 5345 Armada Drive, Carlsbad, CA 92008
3:45 PM
ZIRCON INCLUSIONS IN IGNEOUS-RELATED GEM-CORUNDUM: A SURVEY OF OXYGEN ISOTOPE FRACTIONATION AND GEOCHRONOLOGY
TURNIER, Rachelle B.1, VALLEY, John W.1, KITAJIMA, Kouki1 and PALKE, Aaron C.2, (1)Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton Street, Madison, WI 53706, (2)Gemological Institute of America (GIA), 5355 Armada Dr, Carlsbad, CA 92008
4:00 PM
EVIDENCE OF METASOMATIC CORUNDUM (VAR. SAPPHIRE) FROM THE WHITEHORN STOCK METAMORPHIC AUREOLE IN CENTRAL COLORADO, USA
AERTKER, William S.1, WENDLANDT, Richard F.1 and HENRY, Darrell J.2, (1)Department of Geology and Geological Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, (2)Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803
4:15 PM
HOT LAVAS – COOL GEMSTONES – OREGON SUNSTONE GEOLOGIC HISTORY
BREITSPRECHER, Charles H., Geology, California State University - Sacramento, Sacramento, CA 95825
4:30 PM
JET: A JURASSIC PLASTIC LOST IN THE ANTHROPOCENE?
STEELE, Sarah, 138 Curch Street, Whitby, YO22 4DE, United Kingdom
4:45 PM
DISCOVERY OF A POSSIBLE NEW GEM MINERAL OF THE BERYL FAMILY FROM THE MOGOK STONE TRACT, MYANMAR
PALKE, Aaron C.1, HENLING, Lawrence M.2, MA, Chi3, ROSSMAN, George R.4, SUN, Ziyin1, RENFRO, Nathan D.1 and THU, Kyaw5, (1)Gemological Institute of America (GIA), 5355 Armada Dr, Carlsbad, CA 92008, (2)Beckman Institute, California Institute of Technology, Pasadena, CA 91125, (3)Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, (4)Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125-2500, (5)Macle Gem Trade Laboratory, Yangon, 11141, Myanmar
 
5:00 PM
Discussion
 
5:15 PM
Concluding Remarks
See more of: Technical Sessions