Geological Specimens Rocks And Minerals Appraisal

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Gneiss River Stone

This item is an oval-shaped, naturally tumbled river stone exhibiting characteristic metamorphic banding consistent with Gneiss. The specimen is handheld in scale, approximately 6 to 8 centimeters in diameter, with a smooth, water-worn texture. Its coloration is a variegated mix of dark charcoal gray, silvery gray, and off-white/cream tones. The most notable features are the distinct foliation layers, or mineral banding, created by the segregation of light-colored felsic minerals (such as quartz or feldspar) and dark-colored mafic minerals (such as biotite or hornblende) under intense heat and pressure. The surface shows some small pits and minor abrasions typical of natural transport in water, but remains largely intact with no major fractures. The construction is entirely natural and geological, formed over millions of years. It lacks any anthropogenic modifications such as carving, polishing, or maker's marks. This stone is a high-grade metamorphic rock, showcasing excellent natural craftsmanship through its clear, wavy crystalline bands and dense, compressed structure. It serves as a classic geological specimen for educational or decorative purposes.

Estimated Value

$15.00 - $35.00

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