News

Date : 27.10.2016

Category : Talks and Presentations

SSEF Colour Terms (CIBJO 2016 Armenia talk) presentation online

Dr. Michael S. Krzemnicki recently gave a talk at the CIBJO 2016 Congress in Armenia on 26 October 2016 about Colour Terms and 'Pigeon Blood & Royal Blue: The Harmonised Standard of SSEF and Gübelin Gemlab'. This presentation is now available as a pdf on our website.


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Date : 16.05.2013

Category : Talks and Presentations

New gemstone talks on website

Dr. Michael S. Krzemnicki recently gave two talks, which are now available as pdfs on our website. One talk was given at a GAHK seminar in Hong Kong in March 2013 on Fei Cui and Jadeite nomenclature. The other was on corundum treatments, presented at the annual meeting of the Swiss Gemmological Society (SGG).


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Date : 16.01.2012

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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Date : 02.01.2012

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.

 

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