GIA Presents Diamond Identification Challenges

Gemstone gathering in Bangkok, June 27

CARLSBAD, Calif. – June 25, 2012 – GIA (Gemological Institute of America) will host its next Gemstone Gathering on June 27 in Bangkok, Thailand. Dr. Ahmadjan Abduriyim, research consultant for GIA, will discuss “Diamond Identification Considerations,” focusing on melee-size yellow synthetic diamonds, heat-treated black diamonds, the newly developed nitrogen-ion implantation process and the latest developments concerning chemical vapor deposit (CVD) diamond production.
 
Abduriyim will discuss how the continued rise in demand for jewelry featuring black diamonds in the late 1990s provoked an increase in heat-treated natural diamonds using a high temperature process, and a degree of diversification in the methods used to produce this popular material. This resulted in stones treated by a new experimentally developed nitrogen-ion implantation process. Abduriyim will also provide an update on the latest news concerning CVD diamonds.
 
Abduriyim, a research consultant for GIA, received his doctorate in mineralogy from the Division of Earth and Planetary Science at Kyoto University in Japan. Prior to his tenure at GIA, he served as chief research scientist at the research laboratory of the Gemmological Association of All Japan. Abduriyim has authored numerous gemological articles, including work on geographic origin determination of major gemstones and the applications of LA-ICP-MS in the gemological field, which have been published in major gemological periodicals such as Gems and Gemology.
 
GIA’s Gemstone Gathering is a free event that begins at 6 p.m. on June 27 in the “Crowne Room 1-3” on the 21st floor of the Crowne Plaza Hotel (formerly known as the Pan Pacific), Lumpini Park in Bangkok.