Rock Identifier

Category

Limestone

Browse limestone specimens identified by the Rock Identifier community.

Learn about Limestone in the encyclopedia

Limestone

Limestone

Lithographic Limestone

Lithographic Limestone

Fossiliferous Limestone

Fossiliferous Limestone

Shelly Limestone

Shelly Limestone

Oolitic Limestone

Oolitic Limestone

Crinoidal Limestone

Crinoidal Limestone

Chalky Limestone

Chalky Limestone

Micrite

Micrite

Calcirudite

Calcirudite

Coral Rock

Coral Rock

Oolite

Oolite

Dolomite

Dolomite

Geode (Quartz chalcedony variety) (SiO2 (Silicon Dioxide)) — sedimentary

Geode (Quartz chalcedony variety)

SiO2 (Silicon Dioxide)

Chert (Common Opal/Chalcedony mixture) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Common Opal/Chalcedony mixture)

Silicon Dioxide (SiO2)

Chert (Green variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green variety)

Silicon Dioxide (SiO2)

Fossilized Rugose Coral (Horn Coral) (Order Rugosa (Calcium Carbonate - CaCO3)) — sedimentary

Fossilized Rugose Coral (Horn Coral)

Order Rugosa (Calcium Carbonate - CaCO3)

Chert (specifically Flint or Jasper variant) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (varieties include Jasper or Flint) (Chert (Microcrystalline Silica, formula: SiO2)) — sedimentary

Chert (varieties include Jasper or Flint)

Chert (Microcrystalline Silica, formula: SiO2)

Chert (Jasper/Flint variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Granite (Granite (Mainly SiO2 and Al2O3)) — igneous

Granite

Granite (Mainly SiO2 and Al2O3)

Favosites Fossil (Honeycomb Coral) (Favosites (Order Favositida)) — sedimentary

Favosites Fossil (Honeycomb Coral)

Favosites (Order Favositida)

Chert (Tan or Buffer variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Tan or Buffer variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint) (Microcrystalline Opaline Silica (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Opaline Silica (SiO2)

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Fossilized Favosites (Honeycomb Coral) (Favosites (extinct genus of tabulate coral)) — sedimentary

Fossilized Favosites (Honeycomb Coral)

Favosites (extinct genus of tabulate coral)

Chert (with Quartz Druzy) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (with Quartz Druzy)

Microcrystalline Silica (SiO2)

Chert (and/or Chalcedony) (Silicon dioxide (SiO2)) — sedimentary

Chert (and/or Chalcedony)

Silicon dioxide (SiO2)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (with Quartz Veining) (Chert (formula: SiO2)) — sedimentary

Chert (with Quartz Veining)

Chert (formula: SiO2)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Chalcedony (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Chalcedony

Microcrystalline Quartz (SiO2)

Fossilized Oyster Shell (Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)) — sedimentary

Fossilized Oyster Shell

Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (variously known as Flint or River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variously known as Flint or River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Fossilized Coral (Petoskey Stone or similar Favosites) (Hexagonaria percarinata / Favosites (Silurian-Devonian Coral)) — sedimentary

Fossilized Coral (Petoskey Stone or similar Favosites)

Hexagonaria percarinata / Favosites (Silurian-Devonian Coral)

Shale (Mudstone/Shale) — sedimentary

Shale

Mudstone/Shale

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (and Flint variant) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (and Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Yellow Chert (Chert / Jasper) (Silicon Dioxide (SiO2 / Microcrystalline Quartz)) — sedimentary

Yellow Chert (Chert / Jasper)

Silicon Dioxide (SiO2 / Microcrystalline Quartz)

Chert / Jasper (Silicon Dioxide (SiO₂)) — sedimentary

Chert / Jasper

Silicon Dioxide (SiO₂)

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Black Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Black Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Limestone with Chert or Siltstone bands (Sedimentary carbonate rock (CaCO3) often with siliceous impurities) — sedimentary

Limestone with Chert or Siltstone bands

Sedimentary carbonate rock (CaCO3) often with siliceous impurities