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Fake green rough diamond
GIA Exposes Rough Diamond with Fake Green Color
Manufacturers coated a rough diamond with a green substanceto imitate a natural color, the Gemological Institute of America (GIA) saidafter the stone turned up for grading.The presence of chromium oxide powder on the surface ofthe 6.49-carat crystal...
Rough Markets Aug 19, 2019 Rapaport News
GIA HPHT
Undisclosed Green Synthetics Raise GIA Eyebrows
Twenty-five undisclosed lab-grown diamonds have turned up atthe Gemological Institute of America (GIA) — including several with a raregreenish color. The GIA’s lab in Carlsbad, California, recently received thestones — weighing from 0.46 to 0.52 carats — for...
Technology May 26, 2019 Rapaport News
GIA mistaken
‘Lab-Grown’ Diamond Turns Out to Be Natural
A client of the Gemological Institute of America (GIA)wrongly submitted a natural diamond as a lab-grown stone, the organizationsaid.The GIA’s Carlsbad laboratory recently received the round brilliant,2.23-carat, D-color diamond, which the customer had sent in for asynthetic-diamond...
Polished Markets Feb 06, 2019 Rapaport News
GIA ruby overgrowth
GIA Spots Lab-Grown Ruby Layer on Natural Stones
Attempts to upgrade the size and color ofgemstones using a layer of synthetic material have been around for decades, butsigns indicate the techniques are changing.The Gemological Institute of America (GIA) recently received two loose,...
Technology Mar 19, 2018 Rapaport News
GIA Career Fair 2013
GIA Opens Applications for $2M of Scholarships
The Gemological Institute of America (GIA) is offering morethan $2 million in scholarships for its 2018 education programs, the laboratorysaid Monday.Scholarships are available for online distance-learningcourses and for classes at the GIA’s campuses in Bangkok, Carlsbad,...
Financial-Legal Aug 02, 2017 Rapaport News
Pink GIA diamond CVD H4 defect
GIA Finds Baffling Flaw in CVD Diamond
The Gemological Institute of America (GIA) doesn’t usuallydeclare itself stumped, but a recent discovery of a flaw in a synthetic diamondthat’s almost always associated with natural stones left scientists scratchingtheir heads.Gemologists studying a round, brilliant-cut, 0.26-carat,pink laboratory-grown...
Technology Jul 02, 2017 Joshua Freedman
GIA Grading Report
GIA Seeking Diamond Researchers
The Gemological Institute of America (GIA) is calling on qualifiedresearchers to apply for full-time academic research in mineralogy, geology,physics, materials science and other fields related to gemology. The Richard T. Liddicoat Postdoctoral Research Fellowships at the GIA’s California...
Polished Markets Jan 05, 2017 Rapaport News
GIA
GIA Invalidates 1,000+ Grading Reports After Hackers Alter Data
GIA has invalidated grading reports for 1,042 diamonds submitted primarily to its India grading laboratory after an outside party gained unauthorized access to GIA’s grading information database altered the reports, according to an October 23 announcement.Clients...
Manufacturing Oct 24, 2015 Rapaport News
dreher
GIA Museum Displays Intricate Animal Carvings by Dreher
More than 20 intricately carved and lifelike animal sculptures by gemstone carvers Gerd and Patrick Dreher will go on exhibit at the Gemological Institute of America (GIA) in Carlsbad, California, beginning February 19. The Dreher family, whose...
Gemstones Jan 29, 2015 Jeff Miller
GIA
GIA Opens Recruiting Registration for Oct. Career Fair
Press Release: The Gemological Institute of America (GIA) opened recruiter registration for its upcoming jewelry career fair and open house in Carlsbad, California. GIA’s jewelry career fair and open house, the industry’s...
Marketing Sep 05, 2014 GIA
GIA
ASA, GIA Develop Pilot Course: Advanced Diamond Grading
Press Release: The American Society of Appraisers (ASA) is pleased to announce its partnership with the Gemological Institute of America (GIA) to offer advanced gemological training to gems and jewelry professionals.A pilot course developed by GIA for...
Research Apr 26, 2013 ASA
GIA New
GIA Hosts Career Fair in Carlsbad
The Gemological Institute of America (GIA) will host its Jewelry Career Fair in Carlsbad, California on October 5. GIA’s Jewelry Career Fair is free and marks the one time each year when its Carlsbad campus...
Marketing Sep 04, 2012 Jeff Miller
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