sedimentary

Rounded yellow stone, possibly iron-stained chert or quartzite

Undetermined from image; likely microcrystalline quartz (SiO₂) if chert

AI-generated identification · may be incorrect

Small, rounded, matte yellow-tan pebble with a fine-grained surface; no visible crystals or cleavage. If chert, hardness is about 7 Mohs; the image alone cannot confirm composition or specific gravity.

Identified October 8, 2026More sedimentary →

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Physical properties

Formation & geological history

Could be a naturally rounded pebble shaped by water or abrasion, with yellow coloration from iron oxides. Its geological age and exact formation environment cannot be determined visually.

Uses & applications

Likely a common pebble or craft/collection piece; no distinctive jewelry or industrial value is evident.

Geological facts

Chert and quartzite can both look smooth and opaque, but differ in texture and formation; a scratch or fresh fracture can help distinguish them.

Field identification & locations

Field identification requires testing: quartz-rich material typically scratches glass, while a steel knife will not scratch it easily. Similar pebbles occur in river gravels and weathered sediment deposits worldwide.