Rock Identifier

Category

Sedimentary (Physico Chemical Precipitate)

Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Physico Chemical Precipitate) in the encyclopedia

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Sinter

Coal

Kambaba Jasper

Limestone

Asphalt Rock

Claystone

Mudstone

Sapropel

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

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Clear Quartz (or Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Calcite (Calcium carbonate (CaCO3)) — mineral

Calcite

Calcium carbonate (CaCO3)

Blue calcite (Calcite, CaCO₃) — mineral

Blue calcite

Calcite, CaCO₃

Likely botryoidal calcite or aragonite specimen (Calcite (CaCO₃), possibly aragonite (CaCO₃)) — mineral

Likely botryoidal calcite or aragonite specimen

Calcite (CaCO₃), possibly aragonite (CaCO₃)

Gypsum crystal cluster (selenite/ satin-spar variety) (Gypsum — calcium sulfate dihydrate, CaSO₄·2H₂O) — mineral

Gypsum crystal cluster (selenite/ satin-spar variety)

Gypsum — calcium sulfate dihydrate, CaSO₄·2H₂O

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Druzy Quartz Geode (Oco or Moroccan variety) (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz Geode (Oco or Moroccan variety)

Silicon Dioxide (SiO2)

Quartz on Schist (Silicon Dioxide (SiO2) on Foliated Metamorphic Rock) — metamorphic

Quartz on Schist

Silicon Dioxide (SiO2) on Foliated Metamorphic Rock

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

Quartz Druzy Geode

Silicon Dioxide (SiO2)

Yellow Calcite (Calcium Carbonate, CaCO3) — mineral

Yellow Calcite

Calcium Carbonate, CaCO3

Celestite (Celestine (SrSO4)) — mineral

Celestite

Celestine (SrSO4)

Chert (Microcrystalline or cryptocrystalline quartz) — sedimentary

Chert

Microcrystalline or cryptocrystalline quartz

Quartz (Clear or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear or Cloudy Quartz)

Silicon Dioxide (SiO2)

Druzy Quartz (on Quartzite or Chert) (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz (on Quartzite or Chert)

Silicon Dioxide (SiO2)

Weathered quartz-rich pebble (Likely quartz aggregate, SiO₂, possibly quartzite or silicified rock) — mineral

Weathered quartz-rich pebble

Likely quartz aggregate, SiO₂, possibly quartzite or silicified rock

Banded Iron Formation (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation

Banded Iron Formation (BIF)

Limonite (Iron-rich Siltstone / Sandstone base) (Hydrous ferric oxide mixture (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Sandstone Concretion (Omar or Nut Rock) (Sedimentary Concretion (specifically an 'Omarolluk' or Omar)) — sedimentary

Sandstone Concretion (Omar or Nut Rock)

Sedimentary Concretion (specifically an 'Omarolluk' or Omar)

Banded Iron Formation (BIF) (Banded Iron Formation (Magnetite-Hematite-Chert)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (Magnetite-Hematite-Chert)

Ferruginous Sandstone (Ferruginous Sandstone (Quartz grains with Iron Oxide cement)) — sedimentary

Ferruginous Sandstone

Ferruginous Sandstone (Quartz grains with Iron Oxide cement)

Oolitic Limestone (Oolitic Limestone (CaCO3)) — sedimentary

Oolitic Limestone

Oolitic Limestone (CaCO3)

Oolitic Limestone (Oolite) (Oolitic Limestone (primarily Calcium Carbonate, CaCO3)) — sedimentary

Oolitic Limestone (Oolite)

Oolitic Limestone (primarily Calcium Carbonate, CaCO3)

Banded iron formation (iron-rich metamorphic rock) (BIF; alternating chert/quartz and hematite–magnetite layers) — metamorphic

Banded iron formation (iron-rich metamorphic rock)

BIF; alternating chert/quartz and hematite–magnetite layers

Calcite crystal cluster (Calcite (calcium carbonate, CaCO₃), likely honey or pale-orange calcite) — mineral

Calcite crystal cluster

Calcite (calcium carbonate, CaCO₃), likely honey or pale-orange calcite

Crazy Lace Agate (Agate (Chalcedony), SiO2) — Mineral

Crazy Lace Agate

Agate (Chalcedony), SiO2

Tumbled Hematite (Hematite (Alpha iron oxide, Fe2O3)) — mineral

Tumbled Hematite

Hematite (Alpha iron oxide, Fe2O3)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Red Jasper (Jasper (a variety of Chalcedony, SiO₂ with impurities)) — Mineral

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with impurities)

Honey calcite (yellow calcite) (Calcite, CaCO₃) — mineral

Honey calcite (yellow calcite)

Calcite, CaCO₃

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

Likely quartz fragment

Quartz (silicon dioxide, SiO₂)

Pyrite-bearing quartz specimen (Pyrite (FeS₂) with quartz (SiO₂), possibly minor chalcopyrite or iron oxides) — mineral

Pyrite-bearing quartz specimen

Pyrite (FeS₂) with quartz (SiO₂), possibly minor chalcopyrite or iron oxides

Selenite (satin spar gypsum) (Gypsum, CaSO₄·2H₂O; fibrous variety commonly called satin spar) — mineral

Selenite (satin spar gypsum)

Gypsum, CaSO₄·2H₂O; fibrous variety commonly called satin spar

Celestite (Celestine) Druze on Agate/Host Rock (Strontium sulfate (SrSO4)) — mineral

Celestite (Celestine) Druze on Agate/Host Rock

Strontium sulfate (SrSO4)

Tumbled Yellow Chalcedony / Iron-Stained Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled Yellow Chalcedony / Iron-Stained Quartz

Silicon Dioxide (SiO2)

Dendritic Jasper (SiO2 (Microcrystalline Quartz)) — mineral

Dendritic Jasper

SiO2 (Microcrystalline Quartz)

Tumbled blue calcite (Calcite (CaCO₃), likely blue variety) — mineral

Tumbled blue calcite

Calcite (CaCO₃), likely blue variety

Satin Spar (often marketed as Selenite) (Fibrous Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Agate (specifically Lace Agate or Banded Agate) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically Lace Agate or Banded Agate)

Silicon Dioxide (SiO2)

Honey calcite (yellow calcite) (Calcite, CaCO₃) — mineral

Honey calcite (yellow calcite)

Calcite, CaCO₃

Orange calcite (rough cleavage fragment) (Calcite, CaCO₃) — mineral

Orange calcite (rough cleavage fragment)

Calcite, CaCO₃

Quartz Geode (Macrocrystalline Quartz (SiO2) within a geode structure) — mineral

Quartz Geode

Macrocrystalline Quartz (SiO2) within a geode structure