fossil

Fossilized Shell Fragment

Invertebrate marine fossil, likely calcium carbonate replacement

Hardness varies (often 3-4 if calcite), pale off-white to grey color, dull to earthy luster, curved shape typical of a shell fragment.

Identified August 23, 2026More fossil →

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Physical properties

Hardness varies (often 3-4 if calcite), pale off-white to grey color, dull to earthy luster, curved shape typical of a shell fragment.

Formed through the fossilization process of a marine invertebrate shell in sedimentary environments.

Educational purposes, casual collecting.

Fossils like this are common indicators of past marine environments and are often found in limestone or shale deposits.

Identified by its organic, curved shape mimicking modern shells but petrified. Often found in sedimentary rock formations.

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

Chert with Fossil Brachiopod

Microcrystalline Quartz (SiO2) with Calcitic Brachiopod inclusion

Fossiliferous limestone

Bioclastic carbonate rock; predominantly calcite (CaCO₃), with fossil shell fragments

Sedimentary Outcrop (Sandstone/Shale)

Sedimentary bedrock formation (variable composition)

Crinoid Stem Fossils (Indian Beads / St. Cuthbert's Beads)

Crinoid columnal ossicles (phylum Echinodermata)

Weathered limestone pebble

Limestone, predominantly calcite (CaCO₃), possibly fossiliferous or oolitic