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
Polycristalline Kyanite
first published in Facette 22 (February 2016) The Swiss […]
Colourless Chrysoberyl from Mogok
first published in Facette 22 (February 2016) Chrysober […]
Chasing Cultured Pearls at SSEF: Cultured Pearls using a Natural Pearl as a Bead
As a leading pearl testing laboratory worldwide, the SSEF has analysed in the past few months a large number of pearls for our clients. Besides natural pearls of impressive size or historic provenance (e.g. the pearl pendant of Marie Antoinette and the so called Dodge pearls), we regularly identify and sort out
Paraiba Research Update: An elemental Analysis of Paraiba Tourmaline from Brazil
At the SSEF, origin determination of Paraiba tourmalines is based on years of experience researching collection samples from SSEF and Prof. Hänni collections, donated and loaned samples from clients, as well as knowledge from scientific literature. However, the mining area and depth of the material have been i
ASDI (Automated Spectral Diamond Inspection)
by J.-P. Chalain, first published in Facette 21 (F […]
Blue cobalt spinel from Vietnam
by Dr. M.S. Krzemnicki, first published in Facette […]
Pipi Pearls from the Pacific
first published in Facette 21 (February 2014) In 2 […]
