Rock Identifier

Category

Sedimentary

Browse sedimentary specimens identified by the Rock Identifier community.

Learn about Sedimentary in the encyclopedia

Argillite

Arkose

Banded Iron Formation

Banded Iron Formation

Bauxite

Bituminous Coal

Bituminous Coal

Bituminous Shale

Bituminous Shale

Black Shale

Bog Iron

Breccia

Brecciated Jasper

Brecciated Jasper

Bumblebee Jasper

Bumblebee Jasper

Calcarenite

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Botryoidal Pyrite (Iron Sulfide (FeS2)) — mineral

Botryoidal Pyrite

Iron Sulfide (FeS2)

Jasper (Red Jasper) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

Brachiopod Fossil in Matrix (Phylum Brachiopoda) — fossil

Brachiopod Fossil in Matrix

Phylum Brachiopoda

Gneiss (Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica) — metamorphic

Gneiss

Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica

Clear quartz (rock crystal) (Quartz, crystalline silicon dioxide (SiO₂)) — mineral

Clear quartz (rock crystal)

Quartz, crystalline silicon dioxide (SiO₂)

Weathered iron-stained sandstone (Quartz-rich sandstone, likely ferruginous (iron-oxide cemented)) — sedimentary

Weathered iron-stained sandstone

Quartz-rich sandstone, likely ferruginous (iron-oxide cemented)

Weathered rock fragment (likely limestone) (Calcite-rich limestone, composition and identity uncertain from the image) — sedimentary

Weathered rock fragment (likely limestone)

Calcite-rich limestone, composition and identity uncertain from the image

Red coral (coral beads) (Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)) — gemstone

Red coral (coral beads)

Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Banded gneiss (Gneiss, chiefly quartz–feldspar–mica) — metamorphic

Banded gneiss

Gneiss, chiefly quartz–feldspar–mica

Sandstone (Sandstone (Arenite)) — sedimentary

Sandstone

Sandstone (Arenite)

Sandstone (likely Graywacke or Lithic Arenite) (Clastic sedimentary rock predominantly composed of silicate grains) — sedimentary

Sandstone (likely Graywacke or Lithic Arenite)

Clastic sedimentary rock predominantly composed of silicate grains

Selenite / Gypsum (Gypsum (CaSO4·2H2O)) — Mineral

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Sandstone (Clastic sedimentary rock (Quartz arenite)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite)

Sandstone (Clastic Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Clastic Sedimentary Rock (Quartz arenite)

Sandstone (likely Arkose or Lithic) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (likely Arkose or Lithic)

Clastic sedimentary rock (primarily SiO2)

Quartzite Conglomerate (Conglomerate (SiO2 rich)) — sedimentary

Quartzite Conglomerate

Conglomerate (SiO2 rich)

Polished brown flint/chert nodule (Microcrystalline quartz (SiO₂), commonly called flint or chert) — sedimentary

Polished brown flint/chert nodule

Microcrystalline quartz (SiO₂), commonly called flint or chert

Weathered sandstone (Quartz-rich sandstone, likely arkose or feldspathic sandstone) — sedimentary

Weathered sandstone

Quartz-rich sandstone, likely arkose or feldspathic sandstone

Weathered limestone fragment (Calcite-rich limestone (CaCO₃), possibly fossiliferous or brecciated) — sedimentary

Weathered limestone fragment

Calcite-rich limestone (CaCO₃), possibly fossiliferous or brecciated

Shale with Quartz Vein (Argillaceous Shale with Silicon Dioxide Vein) — sedimentary

Shale with Quartz Vein

Argillaceous Shale with Silicon Dioxide Vein

Fossiliferous Limestone with Brachiopod (Phylum Brachiopoda in Sedimentary Matrix (CaCO3)) — fossil

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Coquina / Fossiliferous Limestone (Fossiliferous Limestone / CaCO3) — sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone / CaCO3

Sandstone Pebble (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Sandstone (Quartzose Sandstone (Sedimentary Rock)) — sedimentary

Sandstone

Quartzose Sandstone (Sedimentary Rock)

Sandstone or Quartzite (Arenite (if sedimentary) / Quartzite (if metamorphic)) — Sedimentary or Metamorphic

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Sedimentary or Metamorphic

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

Chert with Limestone

Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix

Sedimentary Rock with Crafts (Pet Rock) (Sedimentary rock decorated with synthetic materials) — sedimentary

Sedimentary Rock with Crafts (Pet Rock)

Sedimentary rock decorated with synthetic materials

Chert (Sedimentary Rock) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Sedimentary Rock)

Silicon Dioxide (SiO2)

Concretion-bearing sedimentary rock (Likely a carbonate-rich concretion in mudstone or siltstone; exact composition cannot be confirmed visually) — sedimentary

Concretion-bearing sedimentary rock

Likely a carbonate-rich concretion in mudstone or siltstone; exact composition cannot be confirmed visually

Stromatolite (stromatolitic limestone) (Laminated microbial carbonate, chiefly calcite (CaCO₃); precise species or age cannot be determined from the photo) — sedimentary

Stromatolite (stromatolitic limestone)

Laminated microbial carbonate, chiefly calcite (CaCO₃); precise species or age cannot be determined from the photo

Ferruginous Siltstone (Siltstone with Magnetite/Hematite bands) — sedimentary

Ferruginous Siltstone

Siltstone with Magnetite/Hematite bands

Chert Nodules in Sedimentary Rock (Microcrystalline Quartz (SiO2) within Clastic Matrix) — sedimentary

Chert Nodules in Sedimentary Rock

Microcrystalline Quartz (SiO2) within Clastic Matrix

Sandstone Pebble (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Sandstone Pebble (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartz Arenite)

Moqui Marble (Shaman Stone) (Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)) — sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Chert (Beach Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Beach Pebble)

Microcrystalline Quartz (SiO2)