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

Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Sandstone (Sandstone (Silicon dioxide, SiO2 based)) — sedimentary

Sandstone

Sandstone (Silicon dioxide, SiO2 based)

Mixed Rock Collection (Pebbles and Stones) (Various geological specimens) — igneous, sedimentary, and metamorphic

Mixed Rock Collection (Pebbles and Stones)

Various geological specimens

igneous, sedimentary, and metamorphic

Small white mineral fragment (Indeterminate; possibly quartz, calcite, or feldspar) — mineral

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Limonite Concretion (Limonite (Hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)) — sedimentary

Limonite Concretion

Limonite (Hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)

Rose Quartz (Rose Quartz (SiO2)) — mineral

Rose Quartz

Rose Quartz (SiO2)

Banded gneiss (likely biotite-rich gneiss) (Gneiss; chiefly quartz, feldspar, biotite, and possibly hornblende) — metamorphic

Banded gneiss (likely biotite-rich gneiss)

Gneiss; chiefly quartz, feldspar, biotite, and possibly hornblende

Quartz-rich granitic rock, possibly pegmatite (Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and mica) — igneous

Quartz-rich granitic rock, possibly pegmatite

Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and mica

Chert (Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2)

Rounded quartz-rich pebble (Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment) — mineral

Rounded quartz-rich pebble

Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment

Weathered iron-rich rock, possibly limonite/goethite (Limonite (hydrated iron oxides; commonly goethite, FeO(OH), mixed with hematite)) — mineral

Weathered iron-rich rock, possibly limonite/goethite

Limonite (hydrated iron oxides; commonly goethite, FeO(OH), mixed with hematite)

Red Sandstone (Sedimentary Arenite / Quartzose Sandstone) — sedimentary

Red Sandstone

Sedimentary Arenite / Quartzose Sandstone

Fossilized Shell in Limestone (Carbonate sedimentary rock with Bivalvia or Brachiopoda remains) — fossil

Fossilized Shell in Limestone

Carbonate sedimentary rock with Bivalvia or Brachiopoda remains

Conglomerate (River Rock) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

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

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Conglomerate (Puddingstone) (Conglomerate (specifically, clastic sedimentary rock)) — Sedimentary

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color (Silicon Dioxide (SiO2), a variety of Chalcedony) — Sedimentary Rock

Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color

Silicon Dioxide (SiO2), a variety of Chalcedony

Sedimentary Rock

Schist (Biotite Schist) (Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)) — metamorphic

Schist (Biotite Schist)

Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Sandstone Pebble (Quartz Sandstone) — sedimentary

Sandstone Pebble

Quartz Sandstone

Granite / Gneiss (Felsic Metamorphic or Igneous Rock) (Gneiss (or weathered Granite)) — metamorphic

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Yellow Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony

Silicon Dioxide (SiO2)

Mixed River Pebbles (Clastic Sedimentary Alluvial Deposit / Polymictic Conglomerate Clasts) — sedimentary

Mixed River Pebbles

Clastic Sedimentary Alluvial Deposit / Polymictic Conglomerate Clasts

Weathered iron-rich rock, possibly laterite or altered basalt (Probable ferruginous basalt/lat eritic material; exact identification requires testing) — igneous

Weathered iron-rich rock, possibly laterite or altered basalt

Probable ferruginous basalt/lat eritic material; exact identification requires testing

Lapis Lazuli (polished cabochon/sphere) (Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)) — metamorphic

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

Muscovite Schist (Metamorphic rock primarily composed of quartz and muscovite mica) — metamorphic

Muscovite Schist

Metamorphic rock primarily composed of quartz and muscovite mica

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Sedimentary rock composed mainly of quartz sand) — sedimentary

Sandstone

Sedimentary rock composed mainly of quartz sand

Fossiliferous Limestone (Limestone with embedded fossil cross-section) — sedimentary

Fossiliferous Limestone

Limestone with embedded fossil cross-section

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Dalmatian Jasper (Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)) — igneous

Dalmatian Jasper

Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)

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

Milky quartz (quartz crystal)

Quartz, silicon dioxide (SiO₂)

Honey calcite (likely rough cleavage fragment) (Calcite, calcium carbonate (CaCO₃)) — mineral

Honey calcite (likely rough cleavage fragment)

Calcite, calcium carbonate (CaCO₃)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Sandstone (Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)) — Sedimentary

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Granite / Arkosic Sandstone (Coarse Igneous or Sedimentary Aggregate) (Granite / Quartz-Feldspar Aggregate) — igneous

Granite / Arkosic Sandstone (Coarse Igneous or Sedimentary Aggregate)

Granite / Quartz-Feldspar Aggregate

Weathered sandstone or iron-stained sedimentary rock (Quartz-rich sandstone, possibly ferruginous sandstone) — sedimentary

Weathered sandstone or iron-stained sedimentary rock

Quartz-rich sandstone, possibly ferruginous sandstone

Red Sandstone (Arenite (with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide)

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)