SrSO4 - Mohs Hardness: 3 - 3½. Celestine is an attractive mineral consisting of stronitum sulfate that forms in well-shaped crystals with a distinctive blue color. While pure Celestine is colorless, various impurities give this mineral a wider range of colors, especially the unique blue color. Celestine geodes with sky-blue crystals are well-known and abundant from Madagascar. Celestine is the principal source of the element stronitum commonly used in fireworks and in various metal alloys.
Ruth Jacobs Collection
The University of Toledo
Digital Initiatives, University of Toledo Libraries
environmental sciences; virtual exhibitions
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