Rock Identifier

Category

Mineral And Sedimentary

Browse mineral and sedimentary specimens identified by the Rock Identifier community.

Learn about Mineral And Sedimentary in the encyclopedia

Coal

Conglomerate

Glauconite

Quartzite Sandstone

Quartzite Sandstone

Breccia

Hutcheonite

Halite

Ironstone

Sperrylite

Baddeleyite

Anatase

Brookite

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz geode / druzy quartz (Quartz (SiO₂), likely a small chalcedony-lined geode with drusy quartz crystals) — mineral

Quartz geode / druzy quartz

Quartz (SiO₂), likely a small chalcedony-lined geode with drusy quartz crystals

White quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

White quartz pebble

Quartz (silicon dioxide, SiO₂)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

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

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Iron-rich concretion or weathered ironstone (Limonite/goethite-rich iron oxide (hydrated FeO(OH)·nH₂O), possibly with hematite) — mineral

Iron-rich concretion or weathered ironstone

Limonite/goethite-rich iron oxide (hydrated FeO(OH)·nH₂O), possibly with hematite

Mixed mineral and rock collection (Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones) — mineral

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky/Gray variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Gray variety)

Silicon Dioxide (SiO2)

Hematite (Tumbled) (Iron(III) oxide (Fe2O3)) — mineral

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Clear quartz fragment (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz fragment

Quartz, silicon dioxide (SiO₂)

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Hematite (Iron Ore) (Hematite (Fe2O3)) — mineral

Hematite (Iron Ore)

Hematite (Fe2O3)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz) (Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates) — igneous, sedimentary, and metamorphic

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)

Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates

igneous, sedimentary, and metamorphic

Specular Hematite (Specularite) (Iron(III) oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Conglomerate (Clastic Sedimentary Rock) — sedimentary

Conglomerate

Clastic Sedimentary Rock

Tumbled quartz (likely milky quartz) (Quartz — silicon dioxide, SiO₂) — mineral

Tumbled quartz (likely milky quartz)

Quartz — silicon dioxide, SiO₂

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Siltstone (Siltstone (composed of mixed silicate minerals and clay)) — sedimentary

Siltstone

Siltstone (composed of mixed silicate minerals and clay)

Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Pyrite (Pyrite (Iron Disulfide), FeS2) — Mineral

Pyrite

Pyrite (Iron Disulfide), FeS2

Mixed Gemstone Bracelet (Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)) — Mineral/Rock assemblage

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Mineral/Rock assemblage

Fossiliferous Sedimentary Rock (Sedimentary limestone with invertebrate fossil imprint) — fossil

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone (Picture Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

Generic Pebble / Rock Fragment (Lithic fragment / Weathered rock) — sedimentary

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Sandstone (Clastic sedimentary rock (Quartz arenite or Arkose)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite or Arkose)

Brown Sandstone (River Rock) (Arenite) — sedimentary

Brown Sandstone (River Rock)

Arenite

Blue Apatite (Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Sedimentary Sandstone with Iron Oxide (Ferruginous Sandstone) — sedimentary

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Blue Apatite (Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Sedimentary Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sedimentary Sandstone

Arenite (Sedimentary Rock)

Limonite Geode (Ironstone Concretion) (Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior) — sedimentary

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)