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News
Category : Talks and Presentations
Study of historic turquoise imitations (odontolite) in last issue of Gems & Gemology
A recent SSEF study of brooches from the 19th century revealed that most gems were actually turquoise imitations. The results showed that these were mainly fossilized dentine (odontolite). The study was published in the last edition of Gems & Gemology: Krzemnicki, M.S., Herzog, F.A., Zhou, W. (2011) A historic turquoise jewelry set containing fossilized dentine (odontolite) and glass. Gems & Gemology, 47, 4, 296–301
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Category : Talks and Presentations
New research on Bastnäsite from Pakistan
Recent research on the lesser-known mineral and gemstone Bastnäsite by Dr. Franz Herzog of SSEF. This is a fluor-carbonate containing Rare Earth elements (REE). The results of this study were presented at the IGC in July 2011 and are now available online.
Category : Talks and Presentations
Talk on Tokki pearls at IGC 2011 Conference
Dr. Michael S. Krzemnicki gave a talk at the 2011 International Gemmological Conference (IGC) meeting in Interlaken. It was entitled "Tokki Pearls: Additional cultured pearls formed during pearl cultivation: External and internal structures". This presentation presents new research results on these interesting types of pearls and what they can teach us about the formation of natural and cultured pearls.
Category : SSEF around the globe, Talks and Presentations
SSEF co-organises 32nd International Gemmological Conference (IGC)
The Swiss Gemmological Institute SSEF is co-organising the 32nd International Gemmological Conference (IGC) that will take place July 13-17 2011 in Interlaken, Switzerland. This gathering of leading international gemmologists promises to be an interesting conference about gemmology and the science of gemstone testing.