Rock Identifier

Category

Sedimentary (Fossilized Organic Remain)

Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.

Sandstone (likely Quartzose Sandstone pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone pebble)

Arenite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (variable SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (variable SiO2 with Fe2O3 staining)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (Fe2O3 stained)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 stained)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous) (Sandstone (mainly SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Sandstone (mainly SiO2 with Fe2O3 staining)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous) (Ferruginous Sandstone (SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (likely Greywacke or Lithic Sandstone) (Arenite / Wacke) — sedimentary

Sandstone (likely Greywacke or Lithic Sandstone)

Arenite / Wacke

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

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Sandstone (Muddy/Silty Variety) (Arenite with high silt/clay content (clastic sedimentary rock)) — sedimentary

Sandstone (Muddy/Silty Variety)

Arenite with high silt/clay content (clastic sedimentary rock)

Sandstone (likely River-tumbled Picture Sandstone) (Arenite (predominantly SiO2 with iron oxide impurities)) — sedimentary

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

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

Sandstone

Arenite (primarily composed of SiO2)

Sandstone (Quartz-rich) (Arenite (SiO2 based clastic rock)) — sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Micrite/Chalky variety) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Micrite/Chalky variety)

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 inclusions)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 inclusions)

Dalmatian Stone (often called Dalmatian Jasper) (Peralkaline Feldsphathic Igneous Rock) — igneous

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Feldsphathic Igneous Rock

Orbicular Rhyolite (Rainforest Jasper) (Rhyolite containing Spherulites (SiO2 with impurities)) — igneous

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

Dalmatian Stone (commonly Dyed) (Dalmatian Jasper (Peralkaline igneous rock)) — igneous

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Dalmatian Stone (Dalmatian Jasper (actually a Peralkaline Igneous Rock)) — igneous

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Banded Iron Formation (BIF) (Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)

Chert (Common Opal/Agate inclusion) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Chalcedony (Common Opal variant or Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Milky Quartz Pebble with Chert (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble with Chert

Silicon Dioxide (SiO2)

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

Turquoise in Matrix

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

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Pink Garnet (likely Almandine or Rhodolite) (Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)) — mineral

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Fuchsite in Quartz (K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)) — metamorphic

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz (Drusy/Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Jasper (Green Jasper / Chert) (Silicon Dioxide (SiO2) with iron/clay inclusions) — sedimentary

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2) with iron/clay inclusions

Citrine (SiO2 (Silicon Dioxide)) — mineral

Citrine

SiO2 (Silicon Dioxide)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Blue Chalcedony (Chalcedony (SiO2)) — mineral

Blue Chalcedony

Chalcedony (SiO2)