Celestite occurs mainly in sedimentary rocks, particularly dolomites, dolomitic limestones, and marls, either as a direct precipitate from aqueous solutions or, more usually, by the interaction of gypsum or anhydrite with Sr-rich waters. Beds of celestite are therefore found immediately above or below gypsum or anhydrite deposits. The geode forms by groundwater depositing the mineral into cavities of the host rock.
An ancient belief is that celestite was formed by a choir of angels which helped give it the nickname "The Stone of Heaven".
It is believed to be a crystal of love, joy, and light; bringing peace and harmony to those that carry it. Known for reducing stress and anxiety. As an angel crystal, it brings an angelic presence to protect from evil.