We highlight here the experiment performed at 0.2 M CaSO 4 and 0.4 M NaCl (SI: Fig. ). Compared to the high salinity experiment (4.8 M NaCl), the low salinity one showed three significant differences. Firstly, a much higher temperature, T > 115 °C, was required to facilitate the rapid transformation of gypsum to bassanite (SI: Fig. ). Secondly, during this transformation, there was no increase in the sulfate concentration; instead, it sharply dropped (SI: Fig. and SI: S9C) indicate that the solubility crossover occurs at a much lower temperature than predicted in the case of 4.8 M NaCl. This discrepancy is mainly because the calculated solubility of bassanite is much higher than the measured one at high salinity. In contrast, the experimental and calculated solubility values compare better for low salinity, although the experimental values are lower than the predicted ones. The increase in sulfate concentration with increasing temperature, during the high salinity experiment can be attributed to an increase in gypsum solubility, as evidenced by the trend in both calculated and experimental data. Lastly, the fast transformation from bassanite to gypsum at low salinity can also be attributed to the shift in the solubility crossover.