sedimentary

Likely limestone fragment

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

AI-generated identification · may be incorrect

Small, pale cream-white, rough and matte, with an irregular fracture; likely Mohs hardness 3 if calcite-rich. Crystal structure and specific gravity cannot be determined visually.

Identified October 9, 2026More sedimentary →

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Physical properties

Small, pale cream-white, rough and matte, with an irregular fracture; likely Mohs hardness 3 if calcite-rich. Crystal structure and specific gravity cannot be determined visually.

Formation & geological history

If limestone, it formed from accumulated carbonate shells, sediment, or chemical precipitates, later compacted and cemented; its age and precise formation environment are unknown.

Uses & applications

Common limestone is used for cement, aggregate, building stone, and agricultural lime; this small fragment has no evident commercial or jewelry use.

Geological facts

Calcite-rich limestone fizzes when a drop of dilute acid is applied; the image alone cannot confirm the material.

Field identification & locations

The pale color and rough texture fit limestone but can also occur in other rocks. Check for acid fizz and whether it scratches easily; limestone is common in sedimentary regions worldwide.