sedimentary

Belemnite (Fossilized Rostrum)

Belemnitida (order), specifically Neohibolites or similar genera depending on age

AI-generated identification · may be incorrect

Hardness: 3 (calcite preservation), Color: grayish-brown to honey-yellow, Luster: dull to vitreous, Crystal structure: radial calcite fibers within a bullet-shaped form.

Identified June 12, 2026More sedimentary →

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Physical properties

Hardness: 3 (calcite preservation), Color: grayish-brown to honey-yellow, Luster: dull to vitreous, Crystal structure: radial calcite fibers within a bullet-shaped form.

Formation & geological history

Formed from the fossilized internal guard (rostrum) of an extinct cephalopod. These specimens typically date to the Jurassic or Cretaceous periods (approx. 200–66 million years ago) and are found in marine sedimentary layers.

Uses & applications

Educational specimens for study, jewelry (pendants), and heavy inclusion in collector cabinets. Historically used in folk medicine (as 'thunderbolts' or 'Luchssteine').

Geological facts

In medieval times, these were believed to be the points of lightning bolts that had fallen to earth and turned to stone. They were often used to protect against bad luck or lightning strikes.

Field identification & locations

Commonly found in the chalk cliffs and coastal deposits of the Baltic Sea (near Fehmarn/Lolland), matching the 54.5°N, 11.3°E coordinates provided. Identify by the 'bullet' shape and radial pattern in cross-sections.