Rock Identifier

Category

Sedimentary (Chemically Precipitated Mineral)

Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia

Coal

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Glauconite

Breccia

Hutcheonite

Halite

Ironstone

Sperrylite

Baddeleyite

Anatase

Brookite

Jasper with Quartz (Silicon dioxide (SiO2)) — mineral

Jasper with Quartz

Silicon dioxide (SiO2)

Chert (with Quartz veins) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Quartz veins)

Microcrystalline Quartz (SiO2)

Quartz Geode (Silicon dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon dioxide (SiO2)

Flint (SiO2 (Microcrystalline Quartz)) — sedimentary

Flint

SiO2 (Microcrystalline Quartz)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Howlite (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Agate Geode (Silicon dioxide (Chalcedony/Quartz), SiO2) — sedimentary

Agate Geode

Silicon dioxide (Chalcedony/Quartz), SiO2

Dyed Agate Geode (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Banded Chalcedony

Hematite (likely Botryoidal or Specularite variant) (Iron(III) oxide (Fe2O3)) — mineral

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

Geode (Calcite or Quartz) (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)) — sedimentary

Geode (Calcite or Quartz)

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Agate Geode (Silicon dioxide (Quartz), SiO2) — sedimentary

Agate Geode

Silicon dioxide (Quartz), SiO2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Ironstone concretion (likely limonite/goethite-rich) (Iron-oxide-cemented sediment, commonly goethite (FeO(OH)) and/or limonite) — sedimentary

Ironstone concretion (likely limonite/goethite-rich)

Iron-oxide-cemented sediment, commonly goethite (FeO(OH)) and/or limonite

White calcite fragment (likely limestone or marble) (Calcite, calcium carbonate (CaCO₃); exact host rock is uncertain from the image) — mineral

White calcite fragment (likely limestone or marble)

Calcite, calcium carbonate (CaCO₃); exact host rock is uncertain from the image

Banded iron formation fragment (Banded iron formation (BIF), chiefly hematite/magnetite and chert (SiO₂)) — sedimentary

Banded iron formation fragment

Banded iron formation (BIF), chiefly hematite/magnetite and chert (SiO₂)

Chert / Flint (with Crinoid Stem Molds) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint (with Crinoid Stem Molds)

Microcrystalline Quartz (SiO2)

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Baryte (Barite) (Barium sulfate (BaSO4)) — mineral

Baryte (Barite)

Barium sulfate (BaSO4)

Quartz Geode (with Calcite influence) (Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)) — mineral

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Geode (unopened) or Calcareous Nodule (Siliceous or Calcareous Concretion/Nodule) — sedimentary

Geode (unopened) or Calcareous Nodule

Siliceous or Calcareous Concretion/Nodule

Chert (containing Calcite or Quartz inclusions) (Silicon Dioxide (SiO2) with varying mineral impurities) — sedimentary

Chert (containing Calcite or Quartz inclusions)

Silicon Dioxide (SiO2) with varying mineral impurities

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

Tumbled milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Quartz (Milky or Clear fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Clear fragment)

Silicon Dioxide (SiO2)

Flint (SiO2 (Microcrystalline Quartz)) — sedimentary

Flint

SiO2 (Microcrystalline Quartz)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Chert (with Calcite layering) (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)) — sedimentary

Chert (with Calcite layering)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Likely serpentinite (serpentine-rich rock) (Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)) — metamorphic

Likely serpentinite (serpentine-rich rock)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Tumbled milky quartz (likely quartz/chalcedony) (Quartz, SiO₂; possibly microcrystalline chalcedony) — mineral

Tumbled milky quartz (likely quartz/chalcedony)

Quartz, SiO₂; possibly microcrystalline chalcedony

Crystalline Quartz (Rough) (Quartz (Silicon Dioxide, SiO2)) — mineral

Crystalline Quartz (Rough)

Quartz (Silicon Dioxide, SiO2)

Amethyst Cluster (Silicon Dioxide (Quartz), SiO2) — mineral

Amethyst Cluster

Silicon Dioxide (Quartz), SiO2

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Satin Spar (Gypsum) (Hydrous Calcium Sulfate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Weathered limestone pebble (Limestone; predominantly calcite (CaCO₃)) — sedimentary

Weathered limestone pebble

Limestone; predominantly calcite (CaCO₃)

Flint Nodule with Chalk Cortex (Chert (Microcrystalline Quartz) SiO2) — sedimentary

Flint Nodule with Chalk Cortex

Chert (Microcrystalline Quartz) SiO2

Fossiliferous Limestone (Biogenic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

Banded ironstone (likely) (Iron-rich, silica-bearing rock; possibly a fragment of banded iron formation (BIF)) — sedimentary

Banded ironstone (likely)

Iron-rich, silica-bearing rock; possibly a fragment of banded iron formation (BIF)

Moqui Marble (Sandstone Concretion) (Hematite-cemented Sandstone (Fe2O3 + SiO2)) — sedimentary

Moqui Marble (Sandstone Concretion)

Hematite-cemented Sandstone (Fe2O3 + SiO2)