Petrology, geothermobarometry and geochemistry of granulite facies wall rocks and hosting gneiss of gemstone deposits from the Mogok area (Myanmar)
Petrology, geothermobarometry and geochemistry of granulite facies wall rocks and hosting gneiss of gemstone deposits from the Mogok area (Myanmar). Journal of Asian Earth Sciences, X 9, 100132.
SSEF validates the ASDI-500 device and provides unique worldwide service for melee diamonds down to 0.5mm
ASDI-500, is the world’s first automatic device to verify the nature of diamonds – natural diamonds VS laboratory-grown diamonds VS diamond simulants – down to the tiny size of half a millimeter (0.5mm or 500 micrometers, hence its name ASDI 500).
Unearthing the past: harnessing history in the study of gemmology
Gemstones have been used in jewellery for millennia, with their history dating back to ancient civilizations. From Egypt to Mesopotamia, India to China, Europe and the Americas, gemstones have held deep cultural significance and have been treasured for their inherent beauty and mystical properties.
Cobalt-bearing Blue Spinel from Lukande, near Mahenge, Tanzania
Cobalt-bearing Blue Spinel from Lukande, near Mahenge, Tanzania. The Journal of Gemmology, 38(5), 474–493.
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
DNA Fingerprinting and Age Dating of Historical Natural Pearls
Presentation by Dr. Laurent E. Cartier at the International Gemmological Conference IGC 2023 in Tokyo, Japan.
Phase transformations as important markers for heat treatment detection of corundum and other gemstones (2023)
Presentation by Michael S. Krzemnicki, Pierre Lefèvre, Wei Zhou at the International Gemmological Conference IGC 2023 in Tokyo, Japan.
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