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SSEF Mourns the Loss of Former Director Professor Henry A. Hänni
January 13, 2025 Basel, Switzerland – It is with sadness that we announce the passing of Professor Henry A. Hänni, former Director of the Swiss Gemmological Institute SSEF, who died peacefully at his home in Basel on January 9, 2025, surrounded by his family. Professor Hänni, whose remarkabl
SSEF at Tucson AGTA show (03 – 09 February 2025)
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 Galleria03 – 09 February 2025 Tel: +41 79 219 72 38 (only during AGTA Tucson
SSEF closed 21 December – 5 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 2025. We would like to inform you that the SSEF laboratory will be closed for the holidays from Decembe
SSEF Scholarship recipients 2024
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
Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination
Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination. Journal of Gemmology, 2024, 39, 4, 338-350.
SSEF director awarded 2024 Bonanno award for gemmological excellence
Dr. Michael S. Krzemnicki, director of SSEF, is the AGA Antonio Bonanno Award recipient for 2024. Dr. Krzemnicki will be formally recognized at the gala dinner dance following the AGA Gemological Conference on February 05, 2025 in Tucson, Arizona. He has been invited to give a presentation on the to
Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan
Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan. Journal of Gemmology, 2024, 39, 1, 7-8.
SSEF launches Education Scholarships
SSEF is launching two educational scholarships in gemmology, that will each be awarded once annually. They allow the scholarship winner to take a course at SSEF for free. SSEF will also cover the necessary economy flights and hotel costs required for the candidate’s participation (1 person) in the
SSEF on-site testing in Hong Kong, 12 – 22 September 2024
We will be in Hong Kong 12 – 22 September offering our on-site testing services, during the upcoming Hong Kong Jewellery and Gem Fairs. Equipped with our mobile instruments and spectrometers, we will be testing coloured gemstones (no diamonds or pearls) at the Asia World Expo (AWE, 16 – 20 Septe
SSEF in Bangkok 14 – 23 August 2024
We will be in Bangkok 14 August – 23 August 2024 offering our on-site testing services. The office will be closed on August 17th and 18th. Our office is in the gem trade district at the Silom Road. Equipped with our instruments and spectrometers, we will be testing coloured gemstones. Please conta
SSEF News with a Focus on Antique Gems and Jewellery (2024)
Presentation by Dr. Michael S. Krzemnicki at the Swiss Gemmological Society SGG meeting in June 2024. Download Pdf Want to learn more about rubies? Start your journey to becoming an ruby expert with our free online course “Introduction to rubies”. Learn all about rubies. Their fascinatin
Low-temperature heating of corundum: possibilities and challenges for detection
Heat treatment is generally applied to gemstones to change and enhance their colour. Over the past few decades, it has become a very common practice for certain gem species, such as aquamarine, amethyst (resulting in citrine), copper-bearing tourmalines (Paraiba), tanzanite, and notably for any colo
Unravelling the secrets of antique jewellery
Testing of antique jewellery at SSEF may provide insights which go far beyond simple gem testing. They add valuable information to the jewel, starting from its design and craftsmanship in the making, the choice of colours and qualities of gemstones, or the facet arrangement and proportions of old cu
Vanadium chrysoberyl
Vanadium as a colouring element is quite often underestimated, mostly as it is often associated and acting together with chromium, a chemical element with a similar geochemical behavior and paragenetic occurrence but which is historically better known in the trade and easier to detect with simple to
The colour range of Paraiba tourmalines
Paraiba tourmalines owe their attractive colour to the presence of copper. In the best case, this gives rise to a vivid blue colour, also known in the trade as ‘neon’ blue or ‘electric’ blue and not known from any other gemstone in nature.
Exceptional set of tourmalines
Paraiba tourmaline is among the most highly prized of gems today and they are sought after for their vivid colour ranging from blue to green.
Estrela de Fura: an exceptional ruby of 55 ct
On the 8th of June 2023, the Estrela de Fura ruby was sold at Sotheby’s in New York for a world record price of US$ 34.8 million. This ruby of 55.22 ct was cut from a 101 ct piece of rough, discovered in July 2022 near Montepuez in Mozambique, in a mine operated by the Fura Gems company.