Coprolite Value Guide

Coprolites are remarkable trace fossils that represent the fossilized organic matter of dinosaurs and ancient animals from the Cretaceous Period. These specimens are highly collectible because they provide a direct, tangible link to prehistoric diets and the digestive processes of extinct species.

What affects the value of Coprolite?

• The presence of visible inclusions such as undigested prey remains significantly increases the scientific and market value.
• Specimen size and the quality of preservation of the external 'droppings' shape affect the $25 average price point.
• The specific mineral replacement—such as colorful agate or jasper—can make a specimen more desirable to collectors.
• The clarity of the surface texture, which helps paleontologists identify the specific type of ancient animal that produced it.

How to Identify Coprolite?

• Look for a distinct cylindrical or bulbous shape often featuring structural folds or 'pinch' marks from the digestive tract.
• Examine the surface for inclusions like tiny fossilized bone fragments, seeds, or fish scales that indicate organic origin.
• Check for a heavy, mineralized feel; authentic Coprolite has been replaced by minerals like silicates or calcium carbonates over millions of years.
• Verify the provenance to ensure the specimen originated from known Cretaceous deposits within the United States.

History of Coprolite

Coprolites offer a unique window into prehistoric ecosystems, providing direct evidence of ancient diets and environments. These fossilized droppings can reveal what animals ate, their digestive processes, and even the types of plants and other organisms present in their habitat millions of years ago. The study of coprolites, known as paleoscatology, is a fascinating branch of paleontology.