2021

by Dr. M.S. Krzemnicki, first published in Facette 26 (May 2020) In the past decade, rubies from Montepuez in the Cabo Delgado province of northeast Mozambique have been the most significant source of gem-quality rubies in the market. These include iconic stones such as the Rhino ruby (22.04 ct), the Scarl

2021

First published in Facette 26 (May 2020) As a foremost authority in the testing of natural pearls, the SSEF has had the chance in the past few decades to see and analyse the most unique and outstanding natural pearls in the market, many of them of historic provenance, such as the Peregrina pearl (see

2021

We are pleased to announce that we will be present with on-site testing services in Münich (Germany) during the GemWorld show (22-24 October 2021) and GemGenève from 4 – 7 November 2021 in Geneva (Switzerland). Our booth number in Münich will be: B6.450 Our booth number at GemGenève will be: A39 Pleas

2021

by Dr. M.S. Krzemnicki, first published in Facette 26 (May 2020) In 2019, the Swiss Gemmological Institute SSEF in collaboration with the Istituto Gemmologico Nazionale IGN Rome (Italy) were able to analyse in detail a unique Roman sapphire intaglio (Figure 1), excavated in 1986 in the House of Gemmarius (

2021

Testing pearl necklaces can be rather painstaking work, as at least two gemmologists at SSEF meticulously and individually check a necklace pearl by pearl, with the aim of finding one (or more) cultured pearl(s) possibly hidden somewhere in the strand. Countless natural pearl necklaces tested at SSEF in the pas