Significant achievements in the harmonisation of wording on laboratory reports and the reporting of new treatments have been chalked up during the 29th meeting of the Laboratory Manual Harmonisation Committee (LMHC), which was hosted by the Gübelin Gem Lab in Lucerne, Switzerland, on November 14 and...
A recently published article by SSEF and co-authors in the Journal of Gemmology examined applications of DNA fingerprinting of pearls, corals and ivory as a method in gemmology.The full article can be downloaded here....
SSEF has conducted an extensive research project to establish more specific criteria to detect low-temperature heat treatment, studying more than 200 unheated and heated rubies (rough and faceted stones) from Mozambique. In combination with close microscopic examination of the samples, specific infrared spectroscopy (FTIR) peak...
Padparadscha-like fancy sapphires with unstable colours from Madagascar. Fancy sapphires recently found in Madagascar showing an unstable colour, shifting from pinkish orange (padparadscha-like) to pink after a fading test are reported. Read Report (PDF)...
The latest edition of SSEF's Facette magazine has been published. It is now also available online as a PDF. This magazine brings you reports of our latest gemmological research and findings, courses and other SSEF activities.Read Facette SSEF Facette No. 24, 2018 featured articles:Padparadscha-like fancy sapphires...
SSEF is introducing to the market a new system for scanning both single and multi-strand pearl necklaces. Called PearlScan®, it is able to count large quantities of pearls on strands and measure their dimensions. Consisting of an A4 scanner, computer and proprietary software, the system...