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

Quartz Crystal on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal on Matrix

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Limonite (Yellow Ochre) (Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Jasper Mushroom Carving (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — mineral

Jasper Mushroom Carving

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Druzy Chalcedony/Quartz on Fluorite core (Silicon Dioxide (SiO2) on Calcium Fluoride (CaF2)) — mineral

Druzy Chalcedony/Quartz on Fluorite core

Silicon Dioxide (SiO2) on Calcium Fluoride (CaF2)

Amethyst Cluster (Silicon Dioxide (Quartz variety: Amethyst) - SiO2) — mineral

Amethyst Cluster

Silicon Dioxide (Quartz variety: Amethyst) - SiO2

Ferruginous Slag (Iron Smelting Byproduct) (Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)) — Mineraloid/Anthropogenic (Technofossil)

Ferruginous Slag (Iron Smelting Byproduct)

Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)

Mineraloid/Anthropogenic (Technofossil)

Desert Rose (Gypsum Rose) (Gypsum (CaSO4·2H2O) with Sand Inclusions) — mineral

Desert Rose (Gypsum Rose)

Gypsum (CaSO4·2H2O) with Sand Inclusions

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite in Quartz (Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Carnelian (SiO2 (Silicon Dioxide) with Iron Oxide impurities) — mineral

Carnelian

SiO2 (Silicon Dioxide) with Iron Oxide impurities

Pyrite with Limonite/Goethite Alteration (Pseudomorph) (Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)) — mineral

Pyrite with Limonite/Goethite Alteration (Pseudomorph)

Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Botryoidal Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Botryoidal Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz with Chalcopyrite and Pyrite (Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)) — mineral

Quartz with Chalcopyrite and Pyrite

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

Celestite (Celestine) (Celestine (Strontium Sulfate, SrSO4)) — Mineral

Celestite (Celestine)

Celestine (Strontium Sulfate, SrSO4)

Amethyst Geode (Quartz (SiO2)) — mineral

Amethyst Geode

Quartz (SiO2)

Calcite crystal cluster (Calcite, calcium carbonate (CaCO₃)) — mineral

Calcite crystal cluster

Calcite, calcium carbonate (CaCO₃)

Specular hematite (micaceous hematite) (Hematite, iron(III) oxide (Fe₂O₃), likely with minor quartz or iron oxides) — mineral

Specular hematite (micaceous hematite)

Hematite, iron(III) oxide (Fe₂O₃), likely with minor quartz or iron oxides

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

Amethyst

Quartz (Silicon Dioxide, SiO2)

Amethyst Cluster (Silicon Dioxide (SiO2 with iron impurities)) — mineral

Amethyst Cluster

Silicon Dioxide (SiO2 with iron impurities)

Grape Agate (Amethystine Chalcedony) (Silicon Dioxide (SiO2) with impurities) — mineral

Grape Agate (Amethystine Chalcedony)

Silicon Dioxide (SiO2) with impurities

Blue Onyx (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Onyx (Agate)

Cryptocrystalline Quartz (SiO2)

Chalcedony (Agate/Chert) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Chert)

Microcrystalline Quartz (SiO2)

Quartz Vein in Host Rock (Gneiss/Schist) (Silicon Dioxide (SiO2) within a metamorphic matrix) — metamorphic

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Ferruginous Conglomerate (Ferruginous Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Sunstone (Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))) — mineral

Sunstone

Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))

Quartz Geode with Iron Oxide (Silicon Dioxide (SiO2) with Hematite/Goethite coatings) — mineral

Quartz Geode with Iron Oxide

Silicon Dioxide (SiO2) with Hematite/Goethite coatings

Slag (Industrial Glass Slag) (Amorphous Silica / Ferro-silicate Slag) — mineraloid / anthropogenic

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

mineraloid / anthropogenic

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Chrysocolla and Azurite on Matrix (Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla) and Copper carbonate hydroxide Cu3(CO3)2(OH)2 (Azurite)) — mineral

Chrysocolla and Azurite on Matrix

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla) and Copper carbonate hydroxide Cu3(CO3)2(OH)2 (Azurite)

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in a Geodic structure) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geodic structure

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

Druzy Quartz

Crystalline Silicon Dioxide (SiO2)

Pyrite in Shale (Iron Disulfide (FeS2) in Sedimentary Shale) — mineral

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)