igneous
Rounded pebble, likely quartz-rich river stone
Indeterminate quartz-feldspar-rich lithology; possibly weathered granite or quartzite
AI-generated identification · may be incorrectSmooth, water-worn, subrounded pebble with gray-green/tan coloration and fine granular texture. Likely hardness about 6–7 Mohs, vitreous-to-dull luster, no obvious cleavage, and moderate-to-high density; exact identification requires a fresh surface, streak, and hardness testing.
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Physical properties
Smooth, water-worn, subrounded pebble with gray-green/tan coloration and fine granular texture. Likely hardness about 6–7 Mohs, vitreous-to-dull luster, no obvious cleavage, and moderate-to-high density; exact identification requires a fresh surface, streak, and hardness testing.
Formation & geological history
Formed as an older crystalline rock and rounded by prolonged transport in a river or shoreline environment. Its geological age cannot be determined visually; the pebble itself is a recent erosional product.
Uses & applications
Suitable mainly as a decorative or educational specimen, landscaping pebble, or craft stone; it has no significant gem or industrial value in this form.
Geological facts
The diffuse pale spots may represent quartz or feldspar grains, but the photograph does not resolve the mineral boundaries reliably enough for a precise name.
Field identification & locations
Look for visible interlocking quartz and feldspar grains to confirm granite, or a sugary fused quartz texture to support quartzite. Common in stream gravels worldwide; a streak plate, steel-glass hardness test, and magnifier would improve identification.
