Charoite is a rare silicate mineral composed primarily of potassium, calcium, and complex silicate chains. It is found only in the Murun Massif of Siberia, Russia, and is known for its vibrant purple color and swirling, fibrous appearance. These pieces have been tumbled for a smooth, polished finish.
Features:
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Composition: Complex silicate mineral with the formula (K,Na)₁₆(Ca,Na)₈(Si,Al)₃₂O₆₀(OH,F)₈·nH₂O, including potassium, calcium, and other elements.
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Appearance: Purple to lavender with pearly or silky luster; often shows fibrous or swirled patterns due to its crystal structure.
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Formation: Forms through the alteration of limestone by heat and chemically active fluids in the presence of syenite intrusions.
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Physical Properties: Moderate hardness (Mohs 5–6), good polish when tumbled, and unique fibrous or swirling texture.
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Educational Value: Useful for studying rare mineral assemblages, metasomatic rock processes, and mineralogical texture.
Tumbled charoites offer a rare and visually distinctive example of mineral transformation and structural complexity in Earth's crust.
