mineral
Likely tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), possibly colored by iron oxides
AI-generated identification · may be incorrectSmall rounded pebble with reddish-brown color, dull to slightly waxy luster, and no visible cleavage; quartz-rich material is typically Mohs hardness 6.5–7 and has a specific gravity around 2.6.
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Physical properties
Small rounded pebble with reddish-brown color, dull to slightly waxy luster, and no visible cleavage; quartz-rich material is typically Mohs hardness 6.5–7 and has a specific gravity around 2.6.
Formation & geological history
Formed when silica-rich fluids cemented or replaced sediment, with iron oxides producing the brown-red coloration; its exact geological age and locality cannot be determined from the image.
Uses & applications
Commonly used for polished stones, cabochons, beads, carvings, and lapidary specimens; not generally used as a major construction stone at this size.
Geological facts
Jasper and chert are varieties of opaque, cryptocrystalline quartz and can look nearly identical without a hardness or streak test.
Field identification & locations
Likely a naturally rounded or tumbled specimen; test whether it scratches glass and inspect a fresh edge for a smooth, glassy fracture. Common sources include deserts, river gravels, and volcanic or sedimentary terrains worldwide.
