sedimentary

Exposed aggregate concrete (stone-chip surface)

Portland-cement concrete containing natural aggregate; not a natural rock

AI-generated identification · may be incorrect

Visible rounded gravel chips, likely quartz, feldspar, and dark lithic fragments, bonded in a cement matrix; individual aggregate grains are typically Mohs 6–7, with variable luster and no unified crystal structure.

Identified August 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Human-made construction material formed by mixing cement, water, and aggregate, then curing; the aggregate may derive from much older igneous, metamorphic, or sedimentary rocks.

Uses & applications

Used for architectural walls, paving, façades, steps, and decorative exposed-aggregate finishes; it has little geological collector value.

Geological facts

The surface was likely mechanically washed or textured to expose the gravel after curing. Its mixed grain composition prevents assigning it a single natural rock name.

Field identification & locations

Identify it by the uniform cement binder, repeated aggregate distribution, angular-to-rounded chips, and architectural placement; natural conglomerate lacks Portland-cement paste and usually shows geological bedding or weathering.