Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein

This study describes hessonite (Fe-bearing variety of grossular garnet), found in the Birlamunda vil

Purple jadeite, renowned for its distinctive purple hues and rich cultural connotations, is highly a

The iron-titanium charge transfer (Fe-Ti CT) is mentioned in numerous articles as the source of the