Wednesday, February 6, 9:00-10:00 a.m.
Pearl Testing: How to distinguish cultured pearls from each other MOHAVE ROOM
Elizabeth Strack, Gemmologisches Institut Hamburg
Intermediate-Advanced. It is more and more difficult to distinguish the different types of cultured pearls from each other. The naked eye is no longer enough. In this seminar you’ll learn about the main x-ray methodologies to recognize natural pearls, but the seminar concentrates on a systematic overview of the methods (x-ray identification and others) that can be applied to distinguish Akoya cultured pearls and South Sea cultured pearls from Chinese freshwater pearls. A systematic approach to pearl testing is possible because of the basic differences in growth processes of all those cultured pearls available on the market. The approach includes the distinction of Japanese from Chinese freshwater cultured pearls and cultured pearls from Mexico and other niche producers such as the Fiji Islands and the Red Sea.