Aurélien Delaunay

Identification of Heat Treatment in Metamorphic-type Blue Sapphires Using FTIR Spectroscopy: New Insights on the 3232 cm−1 Band

Aurélien Delaunay, Ugo Hennebois, Stefanos Karampelas, Emmanuel Fritsch

International audience

fr (code pays fourni par la source)

Study of an ‘Egyptian’ Emerald from the Mineralogy Museum at the Paris School of Mines

Stefanos Karampelas, Éloïse Gaillou, Ugo Hennebois, Annabelle Herreweghe et autres

International audience

Disambiguation of pyrope‐rich garnet inclusions in coloured sapphires from Tanzania and identification of other inclusions by Raman spectroscopy

Stéfanos Karampelas, Ugo Hennebois, Danilo Bersani, Aurélien Delaunay et autres

Abstract Study of inclusions in gems from secondary deposits can give valuable clues on the geologic (and sometimes geographic) origin of these displaced materials. For the present study, seven gem quality fancy‐coloured sapphires from Songea, Tanzania, were selected with, rarely observed in …

it, fr (code pays fourni par la source)

Pink to Purple Sapphires from Ilakaka, Madagascar: Insights to Separate Unheated from Heated Samples

Stéfanos Karampelas, Ugo Hennebois, Jean‐Yves Mevellec, Vincent Pardieu et autres

The present study is focused on the analysis of zircon inclusions found in pink to purple sapphires from Ilakaka (Madagascar) with an optical microscope, Fourier-transform infrared (FTIR), and micro-Raman spectroscopy in order to update previous knowledge and find insights to separate heated …

fr, bh (code pays fourni par la source)

An Historical Alexandrite from the Mineralogy Museum of Paris School of Mines

Éloïse Gaillou, Stefanos Karampelas, Ugo Hennebois, Annabelle Herreweghe et autres

International audience

fr (code pays fourni par la source)

A historical alexandrite at Paris School of Mines

Éloïse Gaillou, Stefanos Karampelas, Farida Maouche, Annabelle Herreweghe et autres

International audience

fr (code pays fourni par la source)

Spectroscopic Study of Egyptian Emeralds

Maria Nikopoulou, Stefanos Karampelas, Éloïse Gaillou, Ugo Hennebois et autres

International audience

gr, fr (code pays fourni par la source)

Gemological study of emeralds from the Crown of Napoleon III at Paris School of Mines

Éloïse Gaillou, Stefanos Karampelas, Annabelle Herreweghe, Farida Maouche et autres

International audience

fr (code pays fourni par la source)

Gemological study of an emerald reportedly from Egypt in Paris School of Mines museum

Stefanos Karampelas, Éloïse Gaillou, Annabelle Herreweghe, Farida Maouche et autres

International audience

fr (code pays fourni par la source)

Hyalite with Magnificent Internal Features

Ugo Hennebois, Aurélien Delaunay, Stefanos Karampelas, Emmanuel Fritsch

International audience

fr (code pays fourni par la source)

Synthetic sapphire with Rose channels

Ugo Hennebois, Aurélien Delaunay, Annabelle Herreweghe, Stefanos Karampelas et autres

International audience

fr (code pays fourni par la source)

Faceted Demantoid Garnet with Spectacular "Horsetail" Inclusions

Ugo Hennebois, Aurélien Delaunay, Stefanos Karampelas, Emmanuel Fritsch

International audience

fr (code pays fourni par la source)