GAAJ-ZENHOKYO Research Department

Leaders in advanced technology
GAAJ-ZENHOKYO is one of the world leaders in gemmological research and is known throughout the industry for its detailed research reports and lab alerts. It is one of the few laboratories globally that specializes in coloured gemstones, their identifying characteristics, their origin, and the wide variety of treatments they are subjected to.
 
Due to its expertise and ongoing development, the research laboratory provides cutting edge technological equipment and the most advanced analysing instruments which ensure accurate reporting and gemmological break-throughs in this scientific field.
 
Forty years of research and development
Drawing on over forty years of experience, the team of world renowned researchers provide independent research results that can be trusted and relied upon.
 
Media coverage and alerts
As part of the ongoing expansion of gemmological knowledge, the lab’s latest research and achievements are publicised through the media, academic conferences and its own in-house monthly journal called "Gemmology".
 
Both the lab reports and lab alerts serve the global industry to update and notify members in the gemmological field of advances, treatment findings and the discovery of new gemmological specimens.
 
Leading source of information internationally
As the foremost research lab, GAAJ-ZENHOKYO is a member of several international gemmological organizations such as the International Gemmological committee (IGC) and the Laboratory Manaual Harmonisation Committee (*LMHC). As such the company is involved in the international arena and is part of both gathering and disseminating the latest gemmological information.
 
*The Laboratory Manual Harmonization Committee (LMHC) is comprised of representatives from CISGEM (Italy), GAAJ-ZENHOKYO Laboratory (Japan), GIA-Laboratory (USA), GIT-Gem Testing Laboratory (Thailand), Gübelin Gem Lab (Switzerland), SSEF Swiss Gemmological Institute (Switzerland).

The LMHC meets several times a year to update or added to the contents of their manual. Comments concerning the contents may be sent to any or all of the LMHC members for future attention. The opinions or findings in this document are based on the state of knowledge at the time of the latest publication and may change as new information becomes available.  The LMHC draws on the individual experiences of its members for the purpose of creating a general philosophy for proper nomenclature and disclosure for laboratories as well as to initiate and suggest "preferable" language to be used in the trade.
 
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