Celestite (SrSO4) is a mineral consisting of strontium sulfate. It is named for its occasional delicate blue color.
It occurs crystallized, also in compact massive and fibrous forms.
... the United States Census Bureau, the town has a total area of 12.7 km² (4.9 mi²). 12.7 km² (4.9 mi²) of it is land and none of the area is covered ...