sedimentary

Coprolite

Fossilized feces (various taxa)

Hardness: 3.5-5.5 (variable); Color: brown, grey, yellowish-brown; Luster: dull to earthy; Texture: often inclusions of bone or scales; Structure: often retains spiral or cylindrical shape.

Hardness: 3
Color: brown, grey, yellowish-brown
Luster: dull to earthy

Identified April 1, 2026More sedimentary →

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Physical properties

Hardness: 3.5-5.5 (variable); Color: brown, grey, yellowish-brown; Luster: dull to earthy; Texture: often inclusions of bone or scales; Structure: often retains spiral or cylindrical shape.

Formation & geological history

Fossilized animal droppings formed through permineralization or replacement by minerals like calcium phosphate or silicates; ages range from 500 million to a few thousand years old.

Uses & applications

Paleontological study, education, jewelry (beads/cabs), and unique collector's novelty items.

Geological facts

Coprolites provide invaluable information about prehistoric diets and digestive systems. The largest coprolite ever found is named 'Barnum' and is over 2 feet long.

Field identification & locations

Identify in the field by their distinct shape (spiral, lobed, or cylindrical), presence of inclusions (scales/bone), and the phosphate test; commonly found in fossiliferous sedimentary layers.