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

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Iron Ore) (Limonite (Hydrated iron oxide - FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (Hydrated iron oxide - FeO(OH)·nH2O)

Chalcopyrite in Quartz (Gold-bearing Ore) (CuFeS2 (Chalcopyrite)) — mineral

Chalcopyrite in Quartz (Gold-bearing Ore)

CuFeS2 (Chalcopyrite)

Specular Hematite (Specularite) (Hematite (Fe2O3)) — mineral

Specular Hematite (Specularite)

Hematite (Fe2O3)

Hematite (Ironstone) Nodule (Hematite (Fe2O3)) — mineral

Hematite (Ironstone) Nodule

Hematite (Fe2O3)

Anthracite Coal (Anthracite (high-rank coal)) — metamorphic

Anthracite Coal

Anthracite (high-rank coal)

Chrysocolla in Malachite (Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)) — mineral

Chrysocolla in Malachite

Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Quartz (SiO2 - Silicon Dioxide)) — Mineral, often found as detrital grains in sedimentary rocks

Quartz

Quartz (SiO2 - Silicon Dioxide)

Mineral, often found as detrital grains in sedimentary rocks

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Chert (often called Flint in this context) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint in this context)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Polished/Tumbled) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Polished/Tumbled)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Green Fluorite with Galena (Calcium Fluoride (CaF2) with Lead Sulfide (PbS)) — mineral

Green Fluorite with Galena

Calcium Fluoride (CaF2) with Lead Sulfide (PbS)

Slag (Ferrous slag (by-product of iron smelting)) — Mineraloid / Anthropogenic

Slag

Ferrous slag (by-product of iron smelting)

Mineraloid / Anthropogenic

Celestite (Celestite (SrSO4)) — mineral

Celestite

Celestite (SrSO4)

Banded Agate (Tumbled Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Carnelian (Agate) (SiO2 (Silicon Dioxide with Iron Oxide inclusions)) — mineral

Carnelian (Agate)

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Chalcedony (Agate/Chert) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2)

Chrysoprase (Nickel-bearing Chalcedony (SiO2 with Ni impurities)) — mineral

Chrysoprase

Nickel-bearing Chalcedony (SiO2 with Ni impurities)

Chalcedony (Agate/Chert variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Goethite (Goethite (FeO(OH))) — mineral

Goethite

Goethite (FeO(OH))

Chert (Flint Nodules) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Microcrystalline Quartz (SiO2)

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

Quartz Geode (Druzy Quartz)

Silicon Dioxide (SiO2)

Iron-stained Quartz (Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)) — mineral

Iron-stained Quartz

Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geode

Orbicular Jasper (Silicon Dioxide (SiO2)) — sedimentary

Orbicular Jasper

Silicon Dioxide (SiO2)

Agate (specifically crazy lace agate / orbicular agate node) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (specifically crazy lace agate / orbicular agate node)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chalcedony (Agate / Jasper Specimen) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Jasper Specimen)

Silicon Dioxide (SiO2)

Botryoidal Hematite (Iron Oxide (Fe2O3)) — mineral

Botryoidal Hematite

Iron Oxide (Fe2O3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Quartz (Gravel Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in sedimentary/volcanic host) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in sedimentary/volcanic host

Sulfur (Native Sulfur (S8)) — mineral

Sulfur

Native Sulfur (S8)

Blue-gray botryoidal mineral specimen (Likely botryoidal chalcedony or hemimorphite; species cannot be confirmed from the image alone) — mineral

Blue-gray botryoidal mineral specimen

Likely botryoidal chalcedony or hemimorphite; species cannot be confirmed from the image alone