Celestite is a mineral composed of strontium sulfate (SrSO₄), best known for its delicate sky-blue color and well-formed crystals. Often found in sedimentary rock formations, celestite forms through the evaporation of sulfate-rich waters and is a key source of the element strontium, which is used in everything from fireworks to scientific instruments.
Features:
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Composition and Formation: Celestite is made of strontium sulfate and typically forms in geodes or as tabular crystals in limestone and dolomite deposits.
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Distinctive Appearance: Its pale blue color and high clarity make it a standout in mineral collections. Crystals can range from transparent to translucent, often forming clusters.
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Geologic Interest: Celestite is commonly found in regions such as Madagascar, Mexico, and parts of the United States (notably Ohio and Michigan).
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Educational Value: A great specimen for teaching about sulfate minerals, crystal systems (orthorhombic), and natural geologic processes.
