Beware of synthetic ruby with ‘zircon-like’ cluster inclusions
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
The Resurrection of Synthetic Coloured Stones
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
ASDI (Automated Spectral Diamond Inspection)
by J.-P. Chalain, first published in Facette 21 (F […]
The Challenge: Identification of a Ramaura Synthetic Ruby
by Dr. Michael S. Krzemnicki, first published in F […]
Undisclosed natural diamonds mixed in a parcel of synthetic diamond
by J.-P. Chalain, first published in Facette 22 (F […]
CVD Synthetic Diamonds and Testing at SSEF
by J.-P. Chalain, first published in Facette 20 (Januar […]
Study of a recut HPHT synthetic diamond: Colour VS size VS SWUV transmission (2019)
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 Separate Natural from Synthetic Diamonds
A Preliminary SIMS Study Using Carbon Isotopes to Separ […]
Diamond testers with a limited performance
Diamond testers with a limited performance. Published i […]