The Gemological Institute of America Gem Laboratory will make two presentations at the International Jewellery London 2004 Show, which takes place Sept. 5–8, and GIA London will welcome show attendees at booth No. G26.

Wendi Mayerson, G.G., Staff Gemologist in the Identification and Research department at the GIA Gem Laboratory, New York, will provide an update on GIA’s research on synthetic diamonds on Sunday, Sept. 5, from 2:30 to 3:15 p.m. On Tuesday, Sept. 7, Mayerson will discuss gem identification highlights from the Laboratory, from 1 to 1:45 p.m.

Today, treated, synthetic, and imitation colored stones are more prevalent than ever. Proper identification is important in maintaining confidence in the value of these items, and is a growing legal concern as well. In her discussion, Mayerson will describe some of the techniques and instruments the GIA Gem Laboratory has employed to identify several unusual and interesting examples.

Information on the International Jewellery London Show and how to register is available on its Web site, www.jewellerylondon.com. For further information about GIA London, visit www.gialondon.co.uk, or call 020 7813 4321, or e-mail, info@gialondon.co.uk. It is located at 99 Great Russell St., London, WC1B.

JCK