Celestite is a mineral primarily composed of strontium sulfate, known for its beautiful light blue color. It often forms in crystal clusters and can be found in sedimentary rocks, particularly in areas with evaporite deposits. Celestite is commonly used in the production of strontium compounds, which have applications in fireworks and in the manufacturing of glass. In addition to its industrial uses, Celestite is also popular among mineral collectors and is believed by some to have metaphysical properties. It is thought to promote calmness and clarity, making it a favored choice for those interested in crystal healing and spiritual practices.