Rock Identifier

Category

Sedimentary Rock

Browse sedimentary rock specimens identified by the Rock Identifier community.

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Fossiliferous Limestone (Shell Fragment) (Biogenic Limestone (Calcium Carbonate / CaCO3)) — sedimentary

Fossiliferous Limestone (Shell Fragment)

Biogenic Limestone (Calcium Carbonate / CaCO3)

Quartz Geode (Cracked Open Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Cracked Open Fragment)

Silicon Dioxide (SiO2)

Agate (specifically Chalcedony nodule) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Pink Chalcedony (Agate/Jasper blend) (Silicon Dioxide (SiO₂)) — mineral

Pink Chalcedony (Agate/Jasper blend)

Silicon Dioxide (SiO₂)

Limonite (Iron Stone) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite (Iron Stone)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Petrified Wood (Silicified Wood (primarily SiO₂ / Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Quartz Geode (River Cobble) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (River Cobble)

Silicon Dioxide (SiO2)

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

Yellow Chert (Jasper)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Mookaite Jasper (Radiolarite (SiO2 with impurities)) — sedimentary

Mookaite Jasper

Radiolarite (SiO2 with impurities)

Chert (often called Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Crushed Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Sedimentary Calcium Carbonate (CaCO3)

Ferruginous Sandstone (Sandstone (arenite) with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Banded Chert (River Cobble) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Cobble)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert with Quartz Veining (Silicon Dioxide (SiO2)) — sedimentary

Chert with Quartz Veining

Silicon Dioxide (SiO2)

Sandstone (Greywacke/Lithic Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Mica Schist with Garnet (Garnetiferous Mica Schist) — metamorphic

Mica Schist with Garnet

Garnetiferous Mica Schist

Turquoise in Matrix (Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise in Matrix

Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Jasper pebble (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary (secondary classification: cryptocrystalline quartz)

Jasper pebble

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary (secondary classification: cryptocrystalline quartz)

Stromatolite (Laminated biogenic sedimentary structure (formed by Cyanobacteria)) — sedimentary

Stromatolite

Laminated biogenic sedimentary structure (formed by Cyanobacteria)

Chalcedony (Botryoidal) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Quartz (Druzy/Macro-crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Chert (Banded) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Banded)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Mica Schist (Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)) — metamorphic

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Fossil Coral (Scleractinia (fossilized calcium carbonate)) — sedimentary

Fossil Coral

Scleractinia (fossilized calcium carbonate)

Sandstone Chert Concretion (Silica-cemented Concretion (primarily SiO2)) — sedimentary

Sandstone Chert Concretion

Silica-cemented Concretion (primarily SiO2)

Sandstone Beach Pebble (Clastic Sandstone (SiO2 - Quartz-dominant)) — sedimentary

Sandstone Beach Pebble

Clastic Sandstone (SiO2 - Quartz-dominant)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Fossilized Brachiopod/Bivalve in Limestone (Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)) — sedimentary

Fossilized Brachiopod/Bivalve in Limestone

Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)

Red Jasper (Brecciated Jasper) (SiO2 (Silicon Dioxide) with Ferric Iron inclusions) — sedimentary

Red Jasper (Brecciated Jasper)

SiO2 (Silicon Dioxide) with Ferric Iron inclusions

Blue Lace Agate (Agate (Variety of Chalcedony, SiO2)) — sedimentary

Blue Lace Agate

Agate (Variety of Chalcedony, SiO2)

Sandstone (Micaceous/Feldspathic variant) (Arenite (specifically subarkose or lithic arenite)) — sedimentary

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)