Rock Identifier

Category

Limestone

Browse limestone specimens identified by the Rock Identifier community.

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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

Charoite (K(Ca,Na)2Si4O10(OH,F) · nH2O) — mineral

Charoite

K(Ca,Na)2Si4O10(OH,F) · nH2O

mineral
Emerald in Matrix (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — gemstone

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

gemstone
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

mineral
Chalcedony Geode Fragment (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony Geode Fragment

Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Banded Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

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

Chert (Flint)

Chert (Cryptocrystalline Silicon Dioxide, SiO2)

sedimentary
Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

mineral
Chert (and/or Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (and/or Flint)

Silicon dioxide (SiO2)

sedimentary
Chert (Beach Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Beach Pebble)

Silicon Dioxide (SiO2)

sedimentary
Chert (Jasper/Agate) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate)

Cryptocrystalline Quartz (SiO2)

sedimentary
Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

mineral
Optical Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Optical Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Fluorite (Green) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Green)

Fluorite (Calcium Fluoride, CaF2)

mineral
Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

sedimentary
Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

mineral
Sphalerite with Galena (Zinc Sulfide ((Zn,Fe)S) and Lead Sulfide (PbS)) — mineral

Sphalerite with Galena

Zinc Sulfide ((Zn,Fe)S) and Lead Sulfide (PbS)

mineral
Epidote (Greenstone) (Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote (Greenstone)

Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

sedimentary
Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

mineral
Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

mineral
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Cinnabar in Matrix (Cinnabar (Mercury(II) sulfide, HgS)) — mineral

Cinnabar in Matrix

Cinnabar (Mercury(II) sulfide, HgS)

mineral
Geode or Concretion (Silica-based Concretion / Quartz Geode) — sedimentary

Geode or Concretion

Silica-based Concretion / Quartz Geode

sedimentary
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Fluorite (Calcium Fluoride (CaF2)) — Mineral

Fluorite

Calcium Fluoride (CaF2)

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

Chert (Flint Pebbles)

Microcrystalline Quartz (SiO2)

sedimentary
Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

mineral
Chert (specifically Brown Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Brown Chert or Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
Celestine (or Celestite) on Matrix (Celestine (SrSO4)) — mineral

Celestine (or Celestite) on Matrix

Celestine (SrSO4)

mineral
Calcite on Host Rock (Calcium Carbonate (CaCO3)) — mineral

Calcite on Host Rock

Calcium Carbonate (CaCO3)

mineral
Chert (specifically Red Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

mineral
Fluorite with Quartz (Fluorite (CaF2) and Quartz (SiO2)) — mineral

Fluorite with Quartz

Fluorite (CaF2) and Quartz (SiO2)

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

Chert (Chalcedony/Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
Chert (Gravel / Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Gravel / Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary