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Video: Watch our latest talk about synthetic diamonds (AGTA Tucson)
Synthetic Diamonds: What’s New and What’s Next? Join Julia Griffith FGA DGA EG from SSEF as she explores intriguing findings from SSEF’s latest research and unpacks what gemmologists need to know now.
Unheated Pink Sapphire from Madagascar with OH-related 3232 and 3185 cm–1 FTIR Bands
A new article in the Journal of Gemmology by SSEF gemmologists examines OH-related FTIR bands at 3232 and 3185 cm⁻¹ — peaks that are often interpreted as indicators of heat treatment.
The 30th Edition of SSEF Facette is now available
The wait is over! We are proud to announce the publication of the 30th edition of SSEF Facette magazine. This milestone issue continues our three-decade tradition of sharing cutting-edge research and insights from the Swiss Gemmological Institute.
A hot issue then and now: the history and future of synthetic coloured stones
The human desire to replicate and create ‘perfect’ gemstones stems from a long history of curiosity about how these beautiful materials form.
Unheated Pink Sapphire from Madagascar with OH-related 3232 and 3185 cm–1 FTIR Bands
The alluvial gem deposits of Ilakaka in south-western Madagascar have been known for more than two decades as an important source of corundum, mainly producing pink to purple stones, but also blue, yellow and padparadscha varieties.
Visit of the Letšeng diamond mine in Lesotho
In November 2025, Dr. Michael S. Krzemnicki and Dr. Michael Mintrone, Head of the Diamond Department at SSEF, were invited to visit the Letšeng diamond mine in Lesotho as part of a collaboration project. The Letšeng diamond mine is known for its large diamonds of exceptional quality and is the h
SSEF on-site testing in Hong Kong, 26 February – 08 March 2026
We will be in Hong Kong 26 February – 08 March 2026 offering our on-site testing services. Equipped with our mobile instruments and spectrometers, we will be testing coloured gemstones (no diamonds or pearls) at the Asia World Expo (02 – 06 March, booth no. 7-J30) and at the Convention & Exh
New insights on Paraíba tourmaline origin determination
Determining the geographic origin of Cu-bearing tourmaline poses a significant challenge in gemmology, particularly when traditional microscopic methods yield inconclusive results. This study applies a combined analytical and computational approach using 469 gem-quality samples from Brazil, Mozambiq
SSEF at Tucson AGTA show (02 – 06 February 2026)
SSEF is honoured to take part in the upcoming edition of the AGTA show in Tucson (AZ, USA). We will be offering coloured gemstone express testing services at our booth in the East Galleria. SSEFAGTA Booth in the East Galleria02 – 06 February 2026Tel: +41 79 219 72 38 (only during AGTA Tucson s
SSEF Scholarship recipients 2025
We are delighted to announce the recipients of the inaugural SSEF Educational Scholarships in Gemmology, awarded annually to individuals with a passion for gemmology. These scholarships, established by the SSEF Foundation to make gemmological education more accessible, allow recipients to take an SS
SSEF closed 20 December – 2 January
Our whole team would like to thank you for your confidence in our services and for following us on our social media accounts. We wish you peaceful holidays and look forward to working with you in 2026. We would like to inform you that the SSEF laboratory will be closed for the holidays from Decembe
Effects of Gamma Irradiation on Corundum: Towards a Potential Detection Method
Corundum, encompassing the highly prized ruby and sapphire varieties, stands as a cornerstone of the global gemstone market.
HFSE-enriched sapphires of gem quality: A combined FTIR and trace element study and implications for heat treatment detection
Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special interest in gemmological research, as the concentration of these so-called high-field- strength-elements (HFSE) often correlate with detectable traces of naturally incorporated beryllium (Whatanakul et a
Julia Griffith joins SSEF as Head of Education
We’re pleased to announce that Julia Griffith FGA, DGA, EG recently joined SSEF to lead our education programs, bringing extensive experience in gemmology training. Formerly with Gem-A and founder of The Gem Academy, Julia is passionate about inspiring professionals and gem enthusiasts through inn
SSEF at the 99th CIBJO Congress
As part of a Swiss non-profit foundation, the Swiss Gemmological Institute SSEF recognises its responsibility to go beyond laboratory services and to actively contribute to the integrity, transparency, and advancement of the gem and jewellery sector. The 99th CIBJO Congress is currently taking place
SSEF at the 38th IGC Conference
The recent International Gemmological Conference (IGC 2025), held in Athens, brought together leading researchers and laboratories from around the world to present the latest advances in gem science. Among the contributors, two researchers from the Swiss Gemmological Institute SSEF presented finding
Väyrynenite of Exceptional Quality and Size, Reportedly from Nigeria
Väyrynenite is an attractive and rare phosphate mineral that—until recently—has been known in gem quality mostly as small, often included stones from northern Pakistan (and less commonly, Afghanistan). Since early 2025, väyrynenite gemstones of exceptional quality and size have entered the m
Species Identification of Coral Jewellery by Genetic Testing: Case Studies, Experiences and Prospects
This article reviews and details how DNA testing can be used to identify species of precious coral used in jewellery. Since certain species are listed by CITES (Convention on Inter- national Trade in Endangered Species of Wild Fauna and Flora), the correct identification of coral species is of utmos