Rock Identifier

Category

Limestone

Browse limestone specimens identified by the Rock Identifier community.

Learn about Limestone in the encyclopedia

Limestone

Lithographic Limestone

Oolitic Limestone

Oolitic Limestone

Fossiliferous Limestone

Fossiliferous Limestone

Chalky Limestone

Crinoidal Limestone

Crinoidal Limestone

Shelly Limestone

Shelly Limestone

Micrite

Calcirudite

Coral Rock

Coquina

Chalk

Flint/Chert Nodule in Limestone (Sedimentary rock containing microcrystalline quartz (SiO2) within a calcium carbonate (CaCO3) matrix) — sedimentary

Flint/Chert Nodule in Limestone

Sedimentary rock containing microcrystalline quartz (SiO2) within a calcium carbonate (CaCO3) matrix

Weathered chert or siliceous limestone (Microcrystalline quartz (SiO₂), possibly with carbonate minerals) — sedimentary

Weathered chert or siliceous limestone

Microcrystalline quartz (SiO₂), possibly with carbonate minerals

Fossiliferous Limestone (Biogenic Sedimentary Rock) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock

Chert Nodule in Limestone (Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Chert Nodule in Limestone

Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)

Limestone (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Limestone (Calcium Carbonate, CaCO3)

Limestone Pebble (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Limestone Pebble

Calcite-rich Sedimentary Rock (CaCO3)

Limestone (Calcareous Sedimentary Rock (CaCO3)) — sedimentary

Limestone

Calcareous Sedimentary Rock (CaCO3)

Druzy Quartz on Limestone (Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)) — sedimentary

Druzy Quartz on Limestone

Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)

Limestone Pebble (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone Pebble

Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone (Calcite (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone

Calcite (CaCO3) with Bioclastic inclusions

Chert (Flint) with Limestone Matrix (Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert (Flint) with Limestone Matrix

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Chert or siliceous limestone fragments (Microcrystalline quartz (chert) and/or calcarenite; exact identification is uncertain from the photograph) — sedimentary

Chert or siliceous limestone fragments

Microcrystalline quartz (chert) and/or calcarenite; exact identification is uncertain from the photograph

Light-colored limestone (likely chalky or calcitic limestone) (Calcite-rich limestone; primarily calcium carbonate, CaCO₃) — sedimentary

Light-colored limestone (likely chalky or calcitic limestone)

Calcite-rich limestone; primarily calcium carbonate, CaCO₃

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Crinoid Stem Fossil (Crinoidea (Class)) — fossil

Crinoid Stem Fossil

Crinoidea (Class)

Limestone (Limestone (CaCO3)) — sedimentary

Limestone

Limestone (CaCO3)

Pyrite on Limestone (Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix) — sedimentary (matrix) / mineral (inclusion)

Pyrite on Limestone

Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix

sedimentary (matrix) / mineral (inclusion)

Quartz / Limestone Gravel (SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)) — igneous and sedimentary mixture

Quartz / Limestone Gravel

SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)

igneous and sedimentary mixture

Limestone (Sedimentary rock composed mainly of calcium carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed mainly of calcium carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone with Bitumen/Chert (Calcite (CaCO3) containing organic hydrocarbons) — sedimentary

Limestone with Bitumen/Chert

Calcite (CaCO3) containing organic hydrocarbons

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) in Carbonate Matrix) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) in Carbonate Matrix

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Sedimentary rock composed of Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert Nodules in Limestone (Cryptocrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodules in Limestone

Cryptocrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Crinoidean Fossil (Stem Fragment) (Phylum Echinodermata, Class Crinoidea) — fossil

Crinoidean Fossil (Stem Fragment)

Phylum Echinodermata, Class Crinoidea

Likely chert or weathered limestone fragment (Microcrystalline quartz (SiO₂) or calcitic limestone (CaCO₃); identification is limited by the blurred image) — sedimentary

Likely chert or weathered limestone fragment

Microcrystalline quartz (SiO₂) or calcitic limestone (CaCO₃); identification is limited by the blurred image

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Chert (and Limestone) (Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)) — sedimentary

Chert (and Limestone)

Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)

Gray Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Gray Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert Nodule in Limestone (Flint in Chalk) (SiO2 (Microcrystalline Quartz) in CaCO3 (Calcite)) — sedimentary

Chert Nodule in Limestone (Flint in Chalk)

SiO2 (Microcrystalline Quartz) in CaCO3 (Calcite)

Limestone (with Chert) (Calcium Carbonate (CaCO3) / Microcrystalline Quartz (SiO2)) — sedimentary

Limestone (with Chert)

Calcium Carbonate (CaCO3) / Microcrystalline Quartz (SiO2)

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Lapis Lazuli (Lazurite with Calcite and Pyrite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2) — metamorphic

Lapis Lazuli

Lazurite with Calcite and Pyrite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2