Celestite(SrSO4) is a mineral consisting of strontium sulfate. It is a unique mineral in Middle Permian of South China. It looks like chrysanthemum, so it is called chrysanthemum stone in China. It is a diagenetic product of BSR, during which unstable aragonite is dissolved and release Sr.
Because it is produced in early diagensis, it can record information of seawater. Strontium isotope of celestite will be of great scientific significance.
Yan, J., and Carlson, E.H., 2003, Nodular celestite in the Chihsia Formation (Middle Permian) of south China: Sedimentology, v. 50, p. 265-278.