sedimentary

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 (Mohs scale); Color: Light grey to beige; Luster: Dull/Earthy; Structure: Fine-grained/Microcrystalline; Cleavage: None/Fragmental; Specific Gravity: 2.3–2.7

Hardness: 3 (Mohs scale)
Color: Light grey to beige
Luster: Dull/Earthy

Identified July 7, 2026More sedimentary →

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Physical properties

Hardness: 3 (Mohs scale); Color: Light grey to beige; Luster: Dull/Earthy; Structure: Fine-grained/Microcrystalline; Cleavage: None/Fragmental; Specific Gravity: 2.3–2.7

Formation & geological history

Formed in marine environments through the accumulation of shell, coral, and algal debris or chemical precipitation. The coordinates provided (Antalya region, Turkey) are rich in Mesozoic and Cenozoic limestone formations, consistent with this water-worn beach pebble.

Uses & applications

Limestone is extensively used in construction, cement manufacturing, agriculture (soil conditioning), and as an industrial raw material. This specific specimen is a decorative or souvenir pebble.

Geological facts

Limestone makes up about 10% of the total volume of all sedimentary rocks on Earth. This pebble's rounded shape is the result of mechanical weathering from wave action or river transport.

Field identification & locations

Identify in the field by its softness (can be scratched by a steel nail) and positive reaction (fizzing) to dilute hydrochloric acid or strong vinegar. Extremely common along the Mediterranean coast of Turkey.