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We will be in Hong Kong 23 February – 04 March 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, 27 Februar

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 Galleria30 January-04 February 2024 Tel: +41 79 219 72 38 (only during AGTA Tucson

We will be in Bangkok 10 – 19 January 2024 offering our on-site testing services. The office will be closed on January 13th and 14th. 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 contact us

The SSEF laboratory will be closed for the holidays from December 21st 2023 to January 2nd 2024. We will reopen on January 3rd 2024. Our whole team would like to thank you for your confidence in our services. We wish you peaceful holidays and look forward to working with you in 2024.

In the past 15 years, Ethiopia has repeatedly gained attention for a variety of new gem finds. In 2008, a large deposit of white play-of-colour opal was found (Rondeau et al., 2010), followed by black opal with play-of-colour in 2013 (Kiefert et al., 2014).

SSEF is honoured to take part in the upcoming edition of the GemGenève show at Palexpo in Geneva. We will be offering coloured gemstone express testing services at our booth A71. SSEFGemGenève Booth A7102-05 November 2023 (November 1st is setup day, goods can be submitted from 10am onwards)Tel: +4

We will be in Hong Kong 14 – 24 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, 18 – 22 Septe

It is always a pleasure for our team to analyse gemstones which are not so common, or sometimes even very rare, but which may compete in beauty and quality (but often not in hardness) with the most prestigious classic gemstones.

Since about three years, we see at SSEF occasionally chrysoberyl samples of very dark purplish to purplish brown colour, sometimes of quite impressive size (>10 ct). Based on chemical composition, these chrysoberyls show distinct concentration of chromium, but no evident change of colour, thus do no