Near-infrared (NIR) transmitted light photomicrographs of fluid inclusions (FIs) hosted in wolframite from the Puy-les-Vignes deposit (sample PLV-7591, “filon 2”). (A) Global view of the studied euhedral wolframite (Wfm) crystal hosted in quartz (Qtz). (B) Intracrystalline zone showing numerous primary (p) and secondary (s) FIs. (C) Secondary fluid inclusion planes (FIP) of Lw having negative crystal shapes crosscutting wolframite. (D) Primary Lw-c aligned along the c-axis of wolframite. (E) Pseudo-secondary (ps) FIP of Lw-c showing regular to slightly irregular shapes. (F-M) Representative two-phase Lw-c showing variable shapes and containing a vapor phase (V) and an aqueous liquid phase (L_aq).