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

Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main minera

Euclase, monoclinic crystal system—is a seldomly occurring mineral and with a Mohs hardness of 7 a

Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex