How is celestine formed?

Celestine, or celestite, is formed primarily through the evaporation of saline waters in sedimentary environments, leading to the precipitation of strontium sulfate. It can also occur in hydrothermal veins and as a secondary mineral in limestone. The mineral typically crystallizes in the form of prismatic or tabular crystals, often associated with other minerals such as gypsum and anhydrite. Its formation is influenced by specific geological conditions, including temperature and pressure variations.