Bivalve Shell Fragment (Biogenic Calcite/Aragonite)
Calcium carbonate (CaCO3, primarily aragonite/calcite)
sedimentary
Category
Sedimentary (Biogenic)
Browse sedimentary (biogenic) specimens identified by the Rock Identifier community.
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Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Sea Shell (Fighting Conch Fragment)
Calcium Carbonate (CaCO3) - Strombus alatus fragment
sedimentary (biogenic)
Cockle Shell (Fossil or Recent)
Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)
Sedimentary (Biogenic, a type of fossil)
Bivalve Shell (Fossil or Contemporary)
Class Bivalvie (various genera and species of clams, cockles, etc.)
Sedimentary (Biogenic sediment or biological remain)
Stromatolite
Biogenic sedimentary rock
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Coquina
Biogenic Limestone
sedimentary
Fossiliferous Limestone (Coquina-like)
Biogenic Limestone
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Coquina
Biogenic Limestone (CaCO3)
sedimentary
Coquina / Shelly Limestone
Coquina (Biogenic Limestone)
sedimentary
Chert (Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in calcitic matrix
sedimentary
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
mineral
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Coquina
Biogenic Limestone (Calcitic)
sedimentary
Coquina Limestone
Coquina (Biogenic Limestone)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Cleavable Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Jasper / Iron-stained Chert)
Microcrystalline Quartz (SiO2 with Fe-oxides)
sedimentary
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Stromatolite
Biogenic sedimentary structure (Stromatolite)
fossil
Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)
Biogenic Sedimentary Rock (CaCO3)
fossil
Coal
Biogenic sedimentary rock (Carbon)
sedimentary
Spiny Oyster Shell
Spondylus (Calcium Carbonate, CaCO3)
mineral
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in Sedimentary Matrix (CaCO3)
fossil
Coquina / Fossiliferous Limestone
Fossiliferous Limestone / CaCO3
sedimentary