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Celestite: Stone of angelic wisdom

February 27, 2012

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by Karyn Diane Kish —  Celestite, also known as celestine, has a chemical composition of the mineral strontium sulfate. It has a hardness of 3 to 3.5, and typically forms tabular and prismatic crystals in the shape of clusters or geodes. The most prominent color is a soft sky blue, which may have been caused […]

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