Rock Identifier

Category

Mineral Precipitate (Anthropogenic Context)

Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.

Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Ocean Jasper (Orbicular Jasper (SiO2)) — mineral

Ocean Jasper

Orbicular Jasper (SiO2)

River Chalcedony / Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

River Chalcedony / Agate

Chalcedony (Silicon Dioxide, SiO2)

Carnelian Agate (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Coquina (Bioclastic Limestone (CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (CaCO3)

Jasper with Quartz Vein (Microcrystalline quartz (SiO2) with impurities) — sedimentary

Jasper with Quartz Vein

Microcrystalline quartz (SiO2) with impurities

Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Silicon Dioxide (SiO2)

Yellow Fluorite (Calcium Fluoride (CaF2)) — mineral

Yellow Fluorite

Calcium Fluoride (CaF2)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with marine fossils) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with marine fossils

Botryoidal pyrite (likely with quartz or chlorite matrix) (Pyrite, FeS₂; botryoidal aggregate) — mineral

Botryoidal pyrite (likely with quartz or chlorite matrix)

Pyrite, FeS₂; botryoidal aggregate

Green Aventurine (Silicon Dioxide (Quartz variety with Fuchsite inclusions - SiO2)) — mineral

Green Aventurine

Silicon Dioxide (Quartz variety with Fuchsite inclusions - SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Honey calcite (optical calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Honey calcite (optical calcite)

Calcite, calcium carbonate (CaCO₃)

Blue calcite (probable) (Calcite, CaCO₃) — mineral

Blue calcite (probable)

Calcite, CaCO₃

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

Banded fluorite tower

Fluorite (calcium fluoride, CaF₂)

Red Jasper and Mookaite Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper and Mookaite Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Native copper nugget (Copper (Cu), commonly with cuprite and copper-oxide alteration) — mineral

Native copper nugget

Copper (Cu), commonly with cuprite and copper-oxide alteration

Milky Quartz (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz Vein Rock (Quartz (Silicon Dioxide, SiO2)) — igneous

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Banded Agate (Eye Agate) (Silicon Dioxide (SiO2, microcrystalline quartz)) — gemstone

Banded Agate (Eye Agate)

Silicon Dioxide (SiO2, microcrystalline quartz)

Clear Quartz (Rock Crystal) Bracelet (Silicon Dioxide (SiO2)) — gemstone

Clear Quartz (Rock Crystal) Bracelet

Silicon Dioxide (SiO2)

Galena (Galena (lead sulfide, PbS), likely with associated sulfide minerals) — mineral

Galena

Galena (lead sulfide, PbS), likely with associated sulfide minerals

Moqui Marble (Concretion) (Iron Oxide Concretion) — sedimentary

Moqui Marble (Concretion)

Iron Oxide Concretion

Iron-rich breccia (likely hematite–goethite breccia) (Hematite (Fe₂O₃) and goethite (FeO(OH)) in a silicified or iron-cemented breccia) — sedimentary

Iron-rich breccia (likely hematite–goethite breccia)

Hematite (Fe₂O₃) and goethite (FeO(OH)) in a silicified or iron-cemented breccia

Aragonite (Aragonite (CaCO3)) — mineral

Aragonite

Aragonite (CaCO3)

Quartzite Geode (unopened) (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite Geode (unopened)

SiO2 (Silicon Dioxide)

Calcite crystal cluster (dogtooth/saddle calcite) (Calcite — calcium carbonate, CaCO₃) — mineral

Calcite crystal cluster (dogtooth/saddle calcite)

Calcite — calcium carbonate, CaCO₃

Orange Calcite (Polished Sphere) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Polished Sphere)

Calcium Carbonate (CaCO3)

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

Quartz Geode Fragment

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

Copper-bearing sulfide ore, possibly bornite/chalcopyrite (Likely bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2) in a sulfide-rich host rock) — mineral

Copper-bearing sulfide ore, possibly bornite/chalcopyrite

Likely bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2) in a sulfide-rich host rock

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

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

Pink calcite cluster (Calcite (calcium carbonate, CaCO₃)) — mineral

Pink calcite cluster

Calcite (calcium carbonate, CaCO₃)

Blue calcite (Calcite (CaCO₃), likely blue calcite with white carbonate matrix) — mineral

Blue calcite

Calcite (CaCO₃), likely blue calcite with white carbonate matrix

Polished blue calcite (likely) (Calcite, CaCO₃) — mineral

Polished blue calcite (likely)

Calcite, CaCO₃

Native copper nugget (Native copper (Cu)) — mineral

Native copper nugget

Native copper (Cu)

Amethyst (Amethyst (Silicon Dioxide - SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)

Tufa (Calcareous Tufa) (Calcareous Tufa (Precipitated CaCO3)) — sedimentary

Tufa (Calcareous Tufa)

Calcareous Tufa (Precipitated CaCO3)

Green fluorite crystal (Fluorite (calcium fluoride, CaF₂)) — mineral

Green fluorite crystal

Fluorite (calcium fluoride, CaF₂)

Desert Rose (Gypsum (variety Selenite) - CaSO4·2H2O) — mineral

Desert Rose

Gypsum (variety Selenite) - CaSO4·2H2O