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GIA CVD
GIA Spots Natural-Synthetic Hybrid Diamond
The Gemological Institute of America (GIA) has discovered asynthetic layer that improved the weight and color of a natural diamond, and haswarned that the phenomenon may be happening more often.The cushion modified brilliant, 0.64-carat...
Technology May 20, 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
Shigley
GIA Honors James Shigley with Top Award
The Gemological Institute of America (GIA) has awarded its highest honor to veteran researcher Dr. James Shigley, a pioneer of synthetic-diamond detection. Shigley received the Richard T. Liddicoat Award for Distinguished Achievement, which is named after...
Research Jan 09, 2019 Rapaport News
Lesedi La Rona
Lesedi La Rona May Once Have Been 2,774ct.
The second-largest diamond in history was probably twice as big before it broke into pieces, researchers at the Gemological Institute of America (GIA) have claimed.Similarities between the 1,109-carat Lesedi La Rona, the 812-carat Constellation and three...
Mining Dec 20, 2018 Joshua Freedman
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 Opens $2M Scholarship 150
GIA Allocates $2M for New Scholarships
The Gemological Institute of America (GIA) will offer $2million in scholarship funds in 2018 to students in its gemology and jewelry-manufacturing-arts programs. The fund includes a new $500,000 endowment —the Charles and Erna Leutwyler Memorial Scholarship...
Polished Markets Jan 30, 2018 Rapaport News
GSI Debbie Azar
GSI Expands Synthetic-Testing Service
Gemological Science International (GSI) has expanded itsservice for detecting synthetic diamonds in jewelry to Hong Kong, India, NewYork and Dubai. The service is open to manufacturers and retailers that wishto have diamonds as small as melee...
Technology Dec 13, 2017 Rapaport News
NGTC GII collaboration
India and China Labs Cooperate
Two major gemological institutions in India and China haveagreed to increase their collaboration in an effort to strengthen trade betweenthe two markets. China’s state-run National Gem Testing Center (NGTC) hassigned a letter of cooperation with the Mumbai-based...
Technology Nov 27, 2017 Rapaport News
Edward Johnson RJC
RJC to Expand with New Development Hire
The Responsible Jewelry Council (RJC) has appointed gemologistEdward Johnson as director of business development, tasking him with improvingthe organization’s relationships with members and other industry players. Johnson (pictured) previously held the same...
Polished Markets Nov 27, 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
IGI Lab
IGI to Launch Associations in Italy
The International Gemological Institute (IGI) will unveiltwo new organizations at a jewelry workshop it’s running in Italy this week.The first, the IGI Italy Association — which is behind theworkshop — will represent the Antwerp-based laboratory’s operations...
Technology Jun 13, 2017 Rapaport News
GIA artisanal miners guide
GIA Launches Gem Guide for Artisanal Miners
The Gemological Institute of America (GIA) is piloting a freegemology guide for artisanal miners in producing countries.The aim is to offer basic gemological and market knowledge inregions where gem-mining takes place, the institute said Tuesday. The...
Mining Apr 05, 2017 Rapaport News
Diamond crushing
Diamond Crushes It in YouTube Test
A GIA-graded natural diamond survived an attempt by videostunt men to crush it with a hydraulic press.Makers of YouTube channel 'Hydraulic Press VS' show aGIA-certified round brilliant, 0.25-carat, F-color, SI1-clarity diamond beingplaced under a crusher. To their delight, the...
Polished Markets Jan 02, 2017 Rapaport News
ICA logo
Press Release: ICA Appoints Gemstone Expert Gary Roskin as Executive Director
Press Release: The International Colored Gemstone Association (ICA) announced on Tuesday that it had appointed gem and jewelry expert Gary Roskin as its executive director, effective August 4. Roskin will be responsible for ICA's day-to-day...
Gemstones Jul 29, 2015 International Colored Gemstone Association
jtv gem-a
Press Release: Gem-A Issues May's Journal of Gemmology
Press Release: The Gemmological Association of Great Britain (Gem-A) has released the latest issue of its academic publication, The Journal of Gemmology, in collaboration with the Swiss Gemmological Institute SSEF and with the support...
Marketing May 08, 2015 Gem-A
jtv gem-a
Gem-A, Gemewizard Begin New Colored Stones Grading Course
The Gemmological Association of Great Britain (Gem-A) introduced a new colored stone grading course that is conducted in association with Gemewizard and is designed to provide jewelers, gemologists and enthusiasts with an introduction to color grading as well as providing...
Marketing Jan 20, 2015 Jeff Miller
pangemtech
Pangemtech Hosts Annual Convocation and Seminar on Synthetics in Pune
Press Release: The Panjikar Gem Research & Tech Institute (Pangemtech) of Pune held its fourth annual convocation on Wednesday, December 3, 2014. The chief guest at this occasion was Dusan Simic of the Analytical Gem...
Marketing Dec 05, 2014 Pangemtech
gsi image logo
GSI Hosts Workshops at the Kerala Gem & Jewelry Show
Press Release: Gemological Science International (GSI), a full-service, high-tech lab designed specifically to meet the rapidly changing needs of the jewelry industry, participates at the Kerala Gems & Jewellery Show (KGJS), 2014. At this premier...
Marketing Dec 01, 2014 GSI
GIA
GIA Researchers Convene for Annual Meeting
Press Release: More than 40 global researchers from the Gemological Institute of America (GIA) met November 12 and 13 for the Institute’s annual research meeting in Carlsbad, California. The scientists reviewed their current gemological research...
Research Nov 17, 2014 GIA
GIA
Students Benefit from GIA-Sponsored Mandela Day Libraries
Press Release: Around 1,600 primary school students from notable mining areas in South Africa – at the Tebogo Primary School in Sonop, located near the platinum mines of Rustenburg, and Kgabang Primary School in Ritchie, outside...
Marketing Oct 31, 2014 GIA
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