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

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Geode (Silicon Dioxide (SiO2) in Host Rock) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Chalcedony (Agate Nodule) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate Nodule)

Silicon Dioxide (SiO2)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Quartz crystal fragment (likely milky quartz) (Quartz, silicon dioxide (SiO₂), trigonal crystal system) — mineral

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Dyed Blue Agate Slice (Silicon Dioxide (SiO2) with artificial dye) — mineral

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) with artificial dye

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Carnelian (Silicon Dioxide (Quartz variety), SiO2) — mineral

Carnelian

Silicon Dioxide (Quartz variety), SiO2

Uncertain small pale mineral fragment (Indeterminate; possibly calcite or a light-colored feldspar fragment) — mineral

Uncertain small pale mineral fragment

Indeterminate; possibly calcite or a light-colored feldspar fragment

Limonite (Ironstone Concretion) (Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)) — sedimentary

Limonite (Ironstone Concretion)

Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)

Quartz with Iron Oxide Inclusions (Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)) — mineral

Quartz with Iron Oxide Inclusions

Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)

Chert (Flint Nodules) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) with Hematite impurities

Calcite crystal cluster (Calcite (calcium carbonate, CaCO₃), likely on a carbonate matrix) — mineral

Calcite crystal cluster

Calcite (calcium carbonate, CaCO₃), likely on a carbonate matrix

Iron-rich rock or Concretion (Ironstone or Limonite concretion) — sedimentary

Iron-rich rock or Concretion

Ironstone or Limonite concretion

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

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

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

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) vein cutting through host rock) — mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) vein cutting through host rock

Milky quartz (likely quartz-rich rock) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Unidentified dark metallic sulfide specimen (Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing) — mineral

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

Weathered limestone (Calcite-rich limestone (predominantly CaCO₃)) — sedimentary

Weathered limestone

Calcite-rich limestone (predominantly CaCO₃)

Chert Nodule in Limestone (Flint in Chalk) (SiO2 (Microcrystalline Quartz) in CaCO3 (Calcite)) — sedimentary

Chert Nodule in Limestone (Flint in Chalk)

SiO2 (Microcrystalline Quartz) in CaCO3 (Calcite)

Red Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Limonite (with Pyrite) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite (with Pyrite)

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

Yellow Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Banded iron formation (ironstone), likely hematite–magnetite-rich (Banded iron formation (BIF); chiefly hematite (Fe₂O₃), magnetite (Fe₃O₄), and quartz (SiO₂)) — metamorphic

Banded iron formation (ironstone), likely hematite–magnetite-rich

Banded iron formation (BIF); chiefly hematite (Fe₂O₃), magnetite (Fe₃O₄), and quartz (SiO₂)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper) (Silicon Dioxide (SiO2) with various inclusions) — mineral

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

Banded fluorite tower (Fluorite (calcium fluoride, CaF₂)) — mineral

Banded fluorite tower

Fluorite (calcium fluoride, CaF₂)

Banded Agate (Lace Agate) (Agate (Variety of Cryptocrystalline Quartz), SiO2) — mineral

Banded Agate (Lace Agate)

Agate (Variety of Cryptocrystalline Quartz), SiO2

Shale with Quartz Veins (Fissile Sedimentary Rock (SiO2)) — sedimentary

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

Aragonite (Aragonite (CaCO3)) — mineral

Aragonite

Aragonite (CaCO3)

Azurite Malachite (Mixed) (Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2) — mineral

Azurite Malachite (Mixed)

Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Milky quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

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

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Banded calcite (likely travertine or flowstone) (Calcite, CaCO₃; possibly speleothem/travertine) — mineral

Banded calcite (likely travertine or flowstone)

Calcite, CaCO₃; possibly speleothem/travertine

Quartzite with Differential Weathering (Quartzite (SiO2)) — metamorphic

Quartzite with Differential Weathering

Quartzite (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — Mineral

Blue Kyanite

Kyanite (Al2SiO5)