Collection: Celestine

Celestine (Celestite) is a beautiful mineral with the chemical formula SrSO₄, celebrated for its distinctive pale blue to deep sky-blue orthorhombic crystals, though specimens may also occur in colorless, white, or rarely other hues. This sedimentary mineral typically forms through the precipitation of strontium-rich solutions, often in association with sulfur, gypsum, and halite in ancient marine environments. Celestine crystallizes in the orthorhombic crystal system, commonly developing as tabular or prismatic crystals with excellent transparency and vitreous luster, though it also occurs as fibrous, granular, or massive aggregates. World-class localities for exceptional celestine specimens include Madagascar (Sakoany deposit), Michigan & Ohio Quarries, Poland (Machów mine), and Tunisia (Bou Jaber), where it forms magnificent crystal clusters in sedimentary sequences and is often associated with calcite, dolomite, fluorite, and barite.