SrSO4Orthorhombic
Celestine
SrSO4
SulfatesChemical FormulaSrSO4
Crystal SystemOrthorhombic
Mohs Hardness3.5
Specific Gravity3.97
ColorColorless, white, pale blue
LusterVitreous
StreakWhite
CleavageOne direction
FractureUneven
Occurrence
Found in sedimentary rocks. Pale blue crystals. Principal ore of strontium.