Rock Identifier

Category

Sedimentary Rock (Possibly Composed Of Various Minerals)

Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia

Asphalt Rock

Rock Salt

Rock Gypsum

Calc-Silicate Rock

Calc-Silicate Rock

Conglomerate

Breccia

Ironstone

Claystone

Coal

Albitite

Limestone

Shale

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Pink Granite (Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Potassium Feldspar)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Potassium Feldspar)

Black granite (likely polished gabbro or diabase) (Granitoid rock dominated by feldspar, quartz, and dark mafic minerals; exact identification requires testing) — igneous

Black granite (likely polished gabbro or diabase)

Granitoid rock dominated by feldspar, quartz, and dark mafic minerals; exact identification requires testing

Septarian Nodule (Septaria (composed of Calcite, Aragonite, and Limestone)) — sedimentary

Septarian Nodule

Septaria (composed of Calcite, Aragonite, and Limestone)

Sandstone (Arenicola (comprising mostly Quartz, SiO2)) — sedimentary

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

Conglomerate (Conglomerate (a clastic sedimentary rock)) — Sedimentary Rock

Conglomerate

Conglomerate (a clastic sedimentary rock)

Sedimentary Rock

Gabbroic rock, possibly hornblende gabbro (Gabbro; coarse-grained mafic silicate rock dominated by plagioclase and pyroxene, with possible hornblende and magnetite) — igneous

Gabbroic rock, possibly hornblende gabbro

Gabbro; coarse-grained mafic silicate rock dominated by plagioclase and pyroxene, with possible hornblende and magnetite

Likely calcite-rich limestone or marble (Calcite (CaCO₃); possibly recrystallized limestone (marble)) — metamorphic

Likely calcite-rich limestone or marble

Calcite (CaCO₃); possibly recrystallized limestone (marble)

Quartz (Milky Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Milky Quartz)

Quartz (Silicon Dioxide, SiO2)

Rounded sandstone pebble (Quartz-rich sandstone; commonly arkose or lithic sandstone) — sedimentary

Rounded sandstone pebble

Quartz-rich sandstone; commonly arkose or lithic sandstone

Argillite / Mudstone (Argillaceous sedimentary rock) — sedimentary

Argillite / Mudstone

Argillaceous sedimentary rock

Lapis Lazuli (Low-grade) (Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Fossiliferous limestone (Bioclastic limestone, composed mainly of calcite (CaCO₃)) — sedimentary

Fossiliferous limestone

Bioclastic limestone, composed mainly of calcite (CaCO₃)

Banded Gneiss (Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Sandstone (Arenite (SiO2 secondary)) — sedimentary

Sandstone

Arenite (SiO2 secondary)

Tumbled Granite (Granite (composed of Quartz, Feldspar, and Mica)) — igneous

Tumbled Granite

Granite (composed of Quartz, Feldspar, and Mica)

Lapis Lazuli (in Matrix) (Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Chert (Flint) (Chert (predominantly SiO₂ - silicon dioxide)) — sedimentary

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

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

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Ferruginous Sandstone (Sandstone with Iron Oxide (Limonite/Goethite)) — sedimentary

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Weathered quartz-rich rock, likely milky quartz or quartzite (Quartz (SiO₂), possibly quartzite with iron-oxide staining) — mineral

Weathered quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide staining

Script Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Script Jasper

Silicon Dioxide (SiO2) with impurities

Siltstone (Siltstone (primarily composed of quartz and clay minerals)) — sedimentary

Siltstone

Siltstone (primarily composed of quartz and clay minerals)

Quartz Vein Rock with Feldspar (Silicon Dioxide (SiO2) with Potassium Feldspar) — mineral

Quartz Vein Rock with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar

Sandstone (Sedimentary Rock (Quartz arenite/Arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Shale (Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)) — sedimentary

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Quartz (Quartz (SiO₂)) — mineral

Quartz

Quartz (SiO₂)

Weathered quartz-rich pebble (tentative) (Likely quartz/chalcedony, SiO₂, possibly iron-stained) — mineral

Weathered quartz-rich pebble (tentative)

Likely quartz/chalcedony, SiO₂, possibly iron-stained

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Ironstone Pebble (Sedimentary ironstone / Hematitic Sandstone) — sedimentary

Ironstone Pebble

Sedimentary ironstone / Hematitic Sandstone

Tumbled dark banded stone, possibly indigo gabbro or banded basalt (Indeterminate; likely fine-grained mafic rock composed mainly of plagioclase and pyroxene, with possible amphibole or alteration minerals) — igneous

Tumbled dark banded stone, possibly indigo gabbro or banded basalt

Indeterminate; likely fine-grained mafic rock composed mainly of plagioclase and pyroxene, with possible amphibole or alteration minerals

River Siltstone Pebble (Siltstone (primarily composed of silica and clay minerals)) — sedimentary

River Siltstone Pebble

Siltstone (primarily composed of silica and clay minerals)

Shale (Shale (Sedimentary rock composed of mud/clay minerals)) — sedimentary

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Shale (Laminated Mudstone (Shale)) — sedimentary

Shale

Laminated Mudstone (Shale)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Turquoise

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

Orange Calcite (likely polished specimen) (Calcite) — Mineral

Orange Calcite (likely polished specimen)

Calcite

Ammonite Fossil in Matrix (Ammonoidea subclass (e.g., Arietites or similar genera)) — fossil

Ammonite Fossil in Matrix

Ammonoidea subclass (e.g., Arietites or similar genera)