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Mica Schist Geological Specimen

This is a hand-sized geological specimen of schist, likely a mica schist, characterized by its distinct metamorphic foliation. The rock exhibits a silvery-white to light tan coloration with a pearly or sub-metallic luster, indicative of high mica content (likely muscovite). Its physical structure displays characteristic 'schistosity,' where the mineral grains have aligned into thin, wavy layers or plates under intense heat and pressure. The texture is medium-grained with a noticeably crenulated surface that catches the light due to the reflective nature of the mica scales. There are visible patches of darker iron-staining or oxidation in certain recessed areas, giving parts of the specimen a tan or light brown earthy appearance. Physically, the specimen is irregularly shaped with jagged edges and a rough, tactile surface that feels flaky to the touch. It appears to be a raw, unpolished field sample with no visible lapidary work or artificial enhancements. There are no maker's marks, as it is a natural mineral formation. The condition is consistent with an untreated geological sample, showing natural weathering and slight crumbling (friability) along the edges of the foliated planes, which is typical for this metamorphic rock type.

Estimated Value

$15 - $35

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