sedimentary

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

AI-generated identification · may be incorrect

Tan, rounded, dull surface with small pits; hardness and crystal structure cannot be determined reliably from the image. It appears embedded on a coarse concrete-like surface, so the pebble’s composition is uncertain.

Identified October 3, 2026More sedimentary →

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Physical properties

Formation & geological history

If limestone, it formed from accumulated carbonate sediment, commonly marine; the pebble was later rounded by abrasion. Its geological age cannot be inferred visually.

Uses & applications

A pebble of this size has little industrial or jewelry use; it may be kept as a curiosity or collected specimen.

Geological facts

The surrounding surface resembles exposed aggregate concrete, which is man-made and distinct from the small pebble.

Field identification & locations

A fizz with dilute acid would support calcite-rich limestone; hardness, streak, and a fresh broken surface could help distinguish other rocks. The image does not establish a specific locality.