“…In recent years, in situ U-Pb geochronology has been successfully applied to a growing number of mineral matrices, including calcite and dolomite (Burisch et al, 2017), hematite (Walter et al, 2018), opal (Nuriel et al, 2019), cassiterite (Moscati and Neymark, 2020), Mn-rich chrysocolla and pseudomalachite (Kahou et al, 2020), epidote (Peverelli et al, 2020), nacrite and fluorite (Piccione et al, 2019). Piccione et al, (2019) reported for the first time LA-ICP-MS U-Pb ages acquired on fluorite that are consistent with those of adjacent nacrite crystals, showing that fluorite U-Pb geochronology can constrain the timing of fluid flows, providing favorable U/Pb.…”