sedimentary

Weathered sandstone

Quartz-rich clastic sandstone, likely iron-oxide stained

AI-generated identification · may be incorrect

Coarse, granular texture with tan, gray, and rusty orange layers; dull to earthy luster and no obvious cleavage. Likely hardness about 6–7 because of quartz grains; individual grains and pores may be visible, with moderate density around 2.2–2.7 g/cm³.

Identified August 13, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand-sized quartz and rock fragments were deposited, compacted, and cemented, commonly in river, beach, or desert settings. Its exact geological age cannot be determined from the photograph; orange coloration reflects later oxidation of iron-bearing minerals.

Uses & applications

Used as building and paving stone, aggregate, and occasionally decorative stone. This small irregular fragment has little commercial value unless tied to a notable geological locality.

Geological facts

The rusty bands are typically hematite or limonite coatings, while the gray-green areas may reflect clay minerals or weathering. Sandstone can preserve sedimentary structures and fossils, though none are evident here.

Field identification & locations

Identify it by its gritty feel, visible sand grains, layered appearance, and weak-to-moderate porosity; it should not fizz strongly with dilute acid. Common worldwide, especially in sedimentary basins; a fresh broken surface gives the best diagnostic view.