Celestine Ore Celestine or celestite is a mineral consisting of strontium sulfate (SrSO4). The mineral is named for its occasional delicate blue color. Basic Information Molecular FormulaSrSO4 ColorMilky, White Density3.9 - 4 g/cm³ Hardness3 - 3.5 (Mohs) TenacityBrittle Transport PackageBulk in Container Production Capacity4000 ton/Month Size10mm - 300mm Analysis SrSO4Grade 1> 90% Grade 285% to 90% Grade 3< 85% BaSO4< 1% Applications of Strontium Military and Oil Industry Making Television Fluorescent Lamps Jewelry Fire Alarm Devices Pharmaceutical Industries