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

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Quartz)

Microcrystalline Silica (SiO2)

Chert (Iron-stained) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Honey Calcite (Calcite (Calcium Carbonate - CaCO3)) — mineral

Honey Calcite

Calcite (Calcium Carbonate - CaCO3)

Chert (Yellow/Tan Variety) (Chert (SiO2)) — sedimentary

Chert (Yellow/Tan Variety)

Chert (SiO2)

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Limestone (River Pebble) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River Pebble)

Sedimentary Calcium Carbonate (CaCO3)

Chert (Flint with Iron Staining) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint with Iron Staining)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint Nodules)

Microcrystalline Quartz (SiO2)

Chert (with Iron Staining) (Chert (SiO2)) — sedimentary

Chert (with Iron Staining)

Chert (SiO2)

Chert (Nodule) (SiO2 (Microcrystalline Quartz)) — sedimentary

Chert (Nodule)

SiO2 (Microcrystalline Quartz)

Chert (vuggy/nodular) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (vuggy/nodular)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (microcrystalline quartz)) — sedimentary

Chert (Flint)

Chert (microcrystalline quartz)

Chert (and Limestone Pebbles) (Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz) — sedimentary

Chert (and Limestone Pebbles)

Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz

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

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert)

Silicon Dioxide (SiO2)

Chert (Chert Nodule in Limestone Host) (Chert (SiO2)) — sedimentary

Chert (Chert Nodule in Limestone Host)

Chert (SiO2)

Calcite (Calcite (CaCO
3)) — Mineral

Calcite

Calcite (CaCO 3)

Septarian Nodule (Septarian Dragon Stone) (Septarian concretion (composition: Calcite CaCO3, Aragonite CaCO3, and Limestone/Clay)) — sedimentary

Septarian Nodule (Septarian Dragon Stone)

Septarian concretion (composition: Calcite CaCO3, Aragonite CaCO3, and Limestone/Clay)

Chert (Common Variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Common Variety)

Cryptocrystalline Quartz (SiO2)

Yellow Calcite (Banded Calcite) (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Nodular Chert) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodular Chert)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (SiO2)

Chert (Flint Nodules) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Flint Nodules)

Microcrystalline silica (SiO2)

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

Yellow Chert (Chert/Jasper)

Silicon Dioxide (SiO2)

Fossilized Brachiopod (Brachiopoda (Phylum), likely Order Spiriferida or Rhynchonellida) — fossil

Fossilized Brachiopod

Brachiopoda (Phylum), likely Order Spiriferida or Rhynchonellida

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

Chert (Black Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint for dark varieties) (Chert (SiO2)) — sedimentary

Chert (often called Flint for dark varieties)

Chert (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert / Flint (Chert (SiO2)) — sedimentary

Chert / Flint

Chert (SiO2)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Chert (Nodular Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodular Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Chert Cobble with Crinoid Fossil (Silica (SiO2) with Crinoid ossicle) — sedimentary

Chert Cobble with Crinoid Fossil

Silica (SiO2) with Crinoid ossicle

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)