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

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)

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)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Likely pale limestone or calcite-rich rock (Calcite-bearing limestone; chiefly calcium carbonate (CaCO₃)) — sedimentary

Likely pale limestone or calcite-rich rock

Calcite-bearing limestone; chiefly calcium carbonate (CaCO₃)

Chert or silicified limestone nodule (Microcrystalline quartz (SiO₂), possibly calcareous chert) — sedimentary

Chert or silicified limestone nodule

Microcrystalline quartz (SiO₂), possibly calcareous chert

Limestone (with crushed gravel) (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone (with crushed gravel)

Limestone (Calcium Carbonate, CaCO3)

Small rounded pebble, likely limestone or chalk (Calcium carbonate, predominantly calcite (CaCO₃)) — sedimentary

Small rounded pebble, likely limestone or chalk

Calcium carbonate, predominantly calcite (CaCO₃)

Quartz (chalcedony variety) or Limestone with Quartz Veins (SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)) — Mineral or Sedimentary Rock (with mineral inclusions)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Mineral or Sedimentary Rock (with mineral inclusions)

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

Gray Limestone Pebble

Calcium Carbonate (CaCO3)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Tumbled fossil-bearing limestone or chert (Microcrystalline calcite (limestone), possibly silicified; fossil fragments visible) — fossil

Tumbled fossil-bearing limestone or chert

Microcrystalline calcite (limestone), possibly silicified; fossil fragments visible

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Organic Inclusions) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Organic Inclusions

Limestone (Calcitic Limestone (CaCO3)) — sedimentary

Limestone

Calcitic Limestone (CaCO3)

Fossiliferous Limestone (Fossiliferous Limestone) — sedimentary

Fossiliferous Limestone

Fossiliferous Limestone

Gray Limestone Fragment (Limestone (CaCO3)) — sedimentary

Gray Limestone Fragment

Limestone (CaCO3)

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Fossiliferous Limestone (Fossiliferous Limestone) — sedimentary

Fossiliferous Limestone

Fossiliferous Limestone

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Carrara Marble (Metamorphosed Limestone) — metamorphic

Carrara Marble

Metamorphosed Limestone

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Crinoidal Limestone (Bioclastic Limestone) — Sedimentary

Crinoidal Limestone

Bioclastic Limestone

Limestone (or Calcite Pebble) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (or Calcite Pebble)

Calcium Carbonate (CaCO3)

Limestone (Fossiliferous) (Calcium Carbonate (CaCO3) - Bioclastic Limestone) — sedimentary

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Limestone (Micrite/Chalky variety) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Micrite/Chalky variety)

Calcium Carbonate (CaCO3)

Likely calcite fragment (Calcite (CaCO₃), possibly limestone or marble) — mineral

Likely calcite fragment

Calcite (CaCO₃), possibly limestone or marble

Chert / Flint (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Lapis Lazuli (Tumbled Stone) (Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)) — metamorphic

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Fossilized Syringopora Coral (Organ Pipe Coral Fossil) (Syringopora sp. (Class Anthozoa, Order Tabulata)) — fossil

Fossilized Syringopora Coral (Organ Pipe Coral Fossil)

Syringopora sp. (Class Anthozoa, Order Tabulata)

Fossilized Coral in Chert (Anthozoa (Class) fossil in Cryptocrystalline Quartz (SiO2)) — fossil

Fossilized Coral in Chert

Anthozoa (Class) fossil in Cryptocrystalline Quartz (SiO2)

Crinoid Stem Segment Fossil (Crinoidea (columnal ossicle)) — fossil

Crinoid Stem Segment Fossil

Crinoidea (columnal ossicle)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Pebble (likely Limestone or Siltstone) (Lithic fragment (calcareous or siliciclastic)) — sedimentary

Pebble (likely Limestone or Siltstone)

Lithic fragment (calcareous or siliciclastic)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Weathered chert or flint nodule (Microcrystalline quartz (SiO₂), commonly with chalcedony and minor iron oxides) — sedimentary

Weathered chert or flint nodule

Microcrystalline quartz (SiO₂), commonly with chalcedony and minor iron oxides

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

Limestone

Limestone (Calcium Carbonate, CaCO3)

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

Limestone

Sedimentary rock composed mainly of calcium carbonate (CaCO3)