A new production process to obtain magnesium-enriched salt from natural mineral water is described. The main purpose of this study was to develop a reproducible process for the production of salt of known and fixed compositions without the addition of chemicals. The first step involved the prediction of the evaporite sequence from the studied spring water composition. This simulation was accomplished with a numerical model previously developed by our team. From the theoretical evaporite sequence of the salt water, the specifications of the pilot could then be established and analytical devices were chosen: chromatographic modules for measuring concentrations and an electronic densimeter to monitor the density of the solution. Later, the experimental study of these tools was performed: operating principle, protocol, repeatability. Finally, the new experimental laboratory scale apparatus was validated.