Tao Hsu, January 25, 2016
All jewellery professionals are familiar with the city of Shenzhen, a global jewellery manufacturing centre and a leader of China’s fast-growing gem and jewellery industry. Join the GIA team as we tour the city and discover more about its leading jewellery brands.
Read More, October 2, 2015
Everyone would agree that exposure and focus are the most critical aspects to consider when photographing gems or jewellery. But there are two other practices that take this kind of photography even further: lighting and positioning of the gem or jewel. The first component ensures a successful photograph. The second makes a picture interesting – or even compelling.
Read MoreCharles E. Ashbaugh III and James E. Shigley, June 1, 1993
Examination of samples of faceted "Ocean green" topaz reveals that this material has been irradiated in a nuclear reactor.
Read MoreDeborah Dupont Martin, June 1, 1987
A treatise on the design, display, care and repair of fine gemstones.
Read MoreRobert C. Kammerling and John I. Koivula, September 1, 1989
Faceted colourless topaz containing acicular inclusions has been offered for sale as "rutilated" topaz.
Read MoreDona M. Dirlam
From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.
Read MoreRobert Crowningshield, December 1, 1981
Large quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.
Read MoreKurt Nassau, March 1, 1985
A review of the various techniques in use today to change colourless topaz to a variety of hues.
Read MoreYou are being redirected to GIA Alumni Association, LLC.