sedimentary

Likely red jasper or iron-rich chert

Microcrystalline quartz (SiO₂) colored by hematite/goethite

AI-generated identification · may be incorrect

Small, naturally worn fragment with dark gray to reddish-brown zones, dull-to-waxy luster, and probable conchoidal fracture; hardness about 6.5–7 Mohs, no obvious cleavage, specific gravity roughly 2.6.

Identified August 30, 2026More sedimentary →

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Physical properties

Formation & geological history

Most likely silica-rich sediment or chemically precipitated chert later stained by iron oxides; its exact geological age cannot be determined from the image. Red coloration commonly develops through oxidation during burial or weathering.

Uses & applications

Used as an ornamental stone, lapidary material, beads, cabochons, and occasionally aggregate; this small unpolished fragment has little commercial value.

Geological facts

Jasper and chert are varieties of microcrystalline quartz, and iron minerals can produce vivid red, brown, or black patterns. The specimen may also be an iron-stained volcanic rock, which cannot be excluded visually.

Field identification & locations

Test for hardness by checking whether it scratches glass, and inspect a fresh edge for waxy luster or conchoidal fracture; a streak test and close examination are useful. Common sources include river gravels and weathered outcrops worldwide.