SSEF on-site testing in Hong Kong, 14 – 24 September 2023
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 September 2023, b
SSEF in Bangkok 23 August – 01 September 2023
We will be in Bangkok 23 August – 01 September 2023 offering our on-site testing services. The office will be closed on August 26th and 27th. 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 to
Irradiation Treatment in Rubies and other Corundum Varieties: Update about Ongoing Research at SSEF on this Issue
Irradiation of corundum varieties to change and enhance their colour is known since many decades but remains a difficult and challenging issue until today, as no gemmological method is currently known which would allow an unambiguous detection of this type of treatment.
SSEF in Bangkok 22 – 26 May 2023
We will be in Bangkok 22 – 26 May 2023 offering our on-site testing services. 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 to make an appointment. More information on our Bangkok services
SSEF FACETTE MAGAZINE 2023
The latest edition (May 2023) of SSEF’s Facette magazine is now available online as a PDF. This magazine brings you reports of our latest gemmological research and findings, courses and other SSEF activities. – The history of gems– Co-bearing spinel from Tanzania– Calibrated coloured stones&
SSEF at GemGenève (11-14 May 2023, Booth B03)
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 B03. SSEFGemGenève Booth B0311-14 May 2023 (May 10th is setup day, goods can be submitted from 10am onwards)Tel: +41 79 219 72 38 (only
New and additional criteria to detect low-T heated pink sapphires applied by SSEF
Heat treatment of ruby, sapphire and other colour varieties of corundum is one of the main issues for the gem trade. As such, detecting such treatment is a major task of gemmological laboratories issuing gemstone reports. Unfortunately, and especially lately, the detection of such heating is not always straight
SSEF at Tucson AGTA show (31 January – 5 February 2023)
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 Galleria31 January-05 February 2023 Tel: +41 79 219 72 38 (only during AGTA Tucson show) Dr. [&
SSEF and UNIMEC introduce the ASDI-500, world’s most precise automated small synthetic diamond screener
The ASDI-500 is able to detect and extract synthetics and simulants as small as half a millimetre in diameter, at the astounding speed of 700 stones per hour. The ASDI-500 Automated Diamond Spectral Inspection system, jointly developed by SSEF and UNIMEC, which will be unveiled at GemGenève International Gem a
SSEF at GemGenève (03-06 November 2022, Booth J16/17)
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 J16/17. SSEFGemGenève Booth J16/1703-06 November 2022 (November 2nd is setup day, goods can be submitted from 10am onwards)Tel: +41 79 2