Gemmologisches Institut Hamburg

Prüflabor und Sachverständigenbüro für die Untersuchung, Graduierung und Bewertung von Diamanten, Farbedelsteinen, Perlen, neuem und altem Schmuck, Veranstaltung von Gemmologie-Seminaren.
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Ihre Elisabeth Strack

Vortrag von Elisabeth Strack am 4.2.2010 in Tucson (AGTA Seminars im Tucson Convention Center), Beginn 9 Uhr:
Developments in the Chinese Pearl Industry

Elisabeth Strack, Gemmologisches Institut Hamburg (Mohave room,9 a.m.) Intermediate ­ Advanced. It is getting more and more difficult for jewelers to keep track of developments in the cultured pearl industry. Traditional producing countries like Japan are losing ground and newly producing countries like Vietnam are on the rise. In addition to producing Akoyas , China produces not only fresh water cultured pearls of all varieties, with and without a nucleus, with and without second and third harvests, but also tries its luck with South Sea cultured pearls. The traditional South Sea countries concentrate their efforts on quality but some producers undermine such efforts. It is getting increasingly more difficult, even for an expert, to distinguish the different types of pearls with the naked eye and evaluate them. Only a systematic approach will help. If eye-visible criteria are not enough, certain testing methods have to be applied which will be presented in this lecture. The lecture will also make reference to artificial coloration and treatments as they often add to the confusion of origin. Methods of detection will be presented.

23.9.09
September Hong Kong Jewellry Fair Asia Expo: 11 a.m.: Pearl Seminar