mineral
Celestine
Celestine (SrSO4)
AI-generated identification · may be incorrectHardness of 3 to 3.5 on the Mohs scale, pale blue color, vitreous to pearly luster, and orthorhombic crystal system with perfect cleavage.
Identified More mineral →
Explore Celestine in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 3 to 3.5 on the Mohs scale, pale blue color, vitreous to pearly luster, and orthorhombic crystal system with perfect cleavage.
Formation & geological history
Formed mainly in sedimentary environments within evaporite deposits, cavities in limestones, and sometimes hydrothermal veins.
Uses & applications
Primary ore of strontium used in fireworks and metallurgy, and highly prized as a decorative collector mineral.
Geological facts
Known for its delicate light blue crystals, the largest known geode of celestine is located in Put-in-Bay, Ohio.
Field identification & locations
Identified by its distinctive pale blue color, softness, and high specific gravity; commonly found in Madagascar, Spain, and the USA.
