Very recently, we tested a tricky case of a synthetic ruby (Figure 1) of 4.27 ct, submitted to SSEF as a natural stone accompanied by two lab reports confirming its natural origin. Under the microscope, the submitted stone showed ‘zircon-like’ cluster inclusions (Figure 2). They were somehow reminiscent of
Occasionally, we encounter synthetic stones at SSEF that are submitted to us by our clients. Usually they are quite surprised by our result, as the issue of synthetic stones – at least in the coloured stone market – has very much vanished in peoples’ minds, and is often not anymore considered a real threa
by Dr. Michael S. Krzemnicki, first published in F […]
by J.-P. Chalain, first published in Facette 22 (F […]
Presentation by Jean-Pierre Chalain at the International Gemmological Conference (IGC) in August 2019.
A Gemmological Approach to Distinguishing Natural from Synthetic Rubies: LA-ICP-TOF mass spectrometry provides new insights (2019)
Presentation at ECMS 2019 in Prague (Czech Republic) by Dr. Tashia J. Dzikowski-Hutter.
A Preliminary SIMS Study Using Carbon Isotopes to Separ […]