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

This presentation explores the modern advancements in freshwater pearl cultivation in China, focusin

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

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