sedimentary

Banded sandstone pebble

Quartz-rich sandstone (composition and exact variety indeterminate from the image)

AI-generated identification · may be incorrect

Rounded, fine-grained pebble with brown and cream bands; likely mostly quartz with iron-oxide staining. Quartz hardness is 7 Mohs, but sandstone hardness varies with cement; luster is dull and grains are too fine to identify crystal structure or cleavage.

Identified October 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Sand-sized sediment was deposited in layers, then compacted and cemented; iron-rich layers or staining produced the bands. Its age and source cannot be determined from appearance alone.

Uses & applications

Commonly used as decorative landscaping stone, in crafts, and as a collectible; sandstone is also widely used as building stone and aggregate.

Geological facts

The parallel bands preserve changes in sediment composition or depositional conditions.

Field identification & locations

Look for visible sand grains and layered coloration; sandstone pebbles occur in riverbeds, beaches, and sedimentary formations. A close-up or hardness test would help confirm identification.