HFSE-enriched sapphires of gem quality: A combined FTIR and trace element study and implications for heat treatment detection

This study presents the results of an interdisciplinary archaeogemological investigation focusing on

Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie

For many, fossiliferous tree resin, primarily amber, gained wide visibility to the public in 1993 wh