a soft, orthorhombic mineral, SrSO, that is the chief ore of strontium; strontium sulfate
Origin:
altered (by James Dwight Dana) < celestine + -ite
See celestite in American Heritage Dictionary 4
noun
A white, red-brown, orange, or light blue principal strontium ore, essentially strontium sulfate, SrSO4, found in sedimentary rock. Also called celestine.