Rock Identifier

Category

Sedimentary (Secondary Mineral Formation)

Browse sedimentary (secondary mineral formation) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Secondary Mineral Formation) in the encyclopedia

Banded Iron Formation

Banded Iron Formation

Itabirite

Jaspillite

Coal

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Glauconite

Breccia

Hutcheonite

Halite

Ironstone

Sperrylite

Basalt (Basalt) — igneous

Basalt

Basalt

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

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Limonite (Yellow Ochre) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Shale (Shale (claystone/mudstone)) — sedimentary

Shale

Shale (claystone/mudstone)

Limonite (Iron Ore) (Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)) — Mineral

Limonite (Iron Ore)

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

Oyster Shell Fragment (Crassostrea virginica (or related Bivalvia)) — fossil

Oyster Shell Fragment

Crassostrea virginica (or related Bivalvia)

Septarian Nodule (Septarian Concretion (Calcite, Aragonite, and Limestone)) — sedimentary

Septarian Nodule

Septarian Concretion (Calcite, Aragonite, and Limestone)

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

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Sandstone (lithic/greywacke variant) (Clastic sedimentary rock (primarily SiO2 with rock fragments)) — sedimentary

Sandstone (lithic/greywacke variant)

Clastic sedimentary rock (primarily SiO2 with rock fragments)

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

Turquoise

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

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

Turquoise

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

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

Turquoise

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

Turquoise (Rough Specimens) (Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (Rough Specimens)

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

Tumbled Agate (Silicon Dioxide (SiO2)) — mineral

Tumbled Agate

Silicon Dioxide (SiO2)

Carnelian (Carnelian (SiO2 with Iron Oxide impurities)) — mineral

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Shiva Eye Shell (Operculum) (Calcium Carbonate (Aragonite), CaCO3) — mineral

Shiva Eye Shell (Operculum)

Calcium Carbonate (Aragonite), CaCO3

Likely weathered quartz-rich rock fragments (Uncertain; visually consistent with massive quartz or quartz-bearing sandstone) — mineral

Likely weathered quartz-rich rock fragments

Uncertain; visually consistent with massive quartz or quartz-bearing sandstone

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (SiO2 based with mineral cement)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cement)

Sandstone with Liesegang Rings (Arenite with Iron Oxide Concretions) — sedimentary

Sandstone with Liesegang Rings

Arenite with Iron Oxide Concretions

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Limonite (Iron Ore) (Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Likely iron-rich sandstone or ironstone fragment (Indeterminate ferruginous sedimentary rock; iron oxides may include hematite (Fe₂O₃) or goethite (FeO(OH))) — sedimentary

Likely iron-rich sandstone or ironstone fragment

Indeterminate ferruginous sedimentary rock; iron oxides may include hematite (Fe₂O₃) or goethite (FeO(OH))

Amygdaloidal Basalt (Extrusive Igneous Rock with Amygdules) — igneous

Amygdaloidal Basalt

Extrusive Igneous Rock with Amygdules

Fossilized Dinosaur Bone (Perineralized Bone (Fluorapatite/Quartz replacement)) — fossil

Fossilized Dinosaur Bone

Perineralized Bone (Fluorapatite/Quartz replacement)

Brecciated Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Brecciated Jasper

Microcrystalline Quartz (SiO2)

Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion (Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image) — fossil

Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion

Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image

Limestone (with Calcite Veining) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with Calcite Veining)

Calcium Carbonate (CaCO3)

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

Yellow Calcite (Polished)

Calcium Carbonate (CaCO3)

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Bauxite (Bauxite (Aluminum Ore)) — sedimentary

Bauxite

Bauxite (Aluminum Ore)

K2 Jasper (K2 Granite) (Azurite in Granite (Biotite Granite containing Azurite)) — igneous

K2 Jasper (K2 Granite)

Azurite in Granite (Biotite Granite containing Azurite)

Pyrite-bearing rock (likely pyrite-rich ore) (Pyrite, FeS₂, in a fine-grained host rock) — mineral

Pyrite-bearing rock (likely pyrite-rich ore)

Pyrite, FeS₂, in a fine-grained host rock

Travertine (likely polished limestone) (Calcite-rich carbonate rock; predominantly CaCO₃) — sedimentary

Travertine (likely polished limestone)

Calcite-rich carbonate rock; predominantly CaCO₃

Limonitic Sandstone with Inclusion (Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)) — sedimentary

Limonitic Sandstone with Inclusion

Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Carnelian (Tumbled Chalcedony) (Silicon Dioxide (SiO2)) — gemstone

Carnelian (Tumbled Chalcedony)

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Drill-core rock, likely foliated metamorphic rock (Indeterminate from the photograph; possibly slate, phyllite, or schist) — metamorphic

Drill-core rock, likely foliated metamorphic rock

Indeterminate from the photograph; possibly slate, phyllite, or schist

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Iron-rich rock, likely hematite/goethite-rich ironstone (Hematite (α-Fe₂O₃), possibly mixed with goethite (FeO(OH)) and gangue minerals) — mineral

Iron-rich rock, likely hematite/goethite-rich ironstone

Hematite (α-Fe₂O₃), possibly mixed with goethite (FeO(OH)) and gangue minerals