Ruby in fuchsite combines two distinct minerals: ruby, a red variety of corundum (Al₂O₃), embedded within fuchsite, a green chromium-rich mica (a potassium aluminum silicate). These tumbled specimens highlight the striking contrast between the vibrant red ruby crystals and the bright green fuchsite matrix.
Features:
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Composition: Ruby is crystalline aluminum oxide, while fuchsite is a chromium-rich variety of muscovite mica (K(Al,Cr)₂(AlSi₃O₁₀)(OH)₂).
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Appearance: Polished stones reveal red ruby inclusions set against a shimmering green background with a pearly luster.
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Formation: Ruby forms in metamorphic rocks such as marble, while fuchsite develops in metamorphosed mica-rich rocks, often occurring together due to similar geological conditions.
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Physical Properties: Ruby is very hard (Mohs 9), whereas fuchsite is softer (Mohs ~2–2.5) but flexible, making the combination visually and texturally interesting.
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Educational Value: Offers insight into mineral coexistence, metamorphic geology, and the effects of trace elements like chromium on mineral color.
Tumbled ruby in fuchsite specimens showcase the beauty and complexity of mineral formation under metamorphic conditions.
