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

Quartzite Arrowhead (Archaeological Lithic) (Recrystallized Quartz (SiO2)) — metamorphic

Quartzite Arrowhead (Archaeological Lithic)

Recrystallized Quartz (SiO2)

Opalite (Synthetic Glass, SiO2 base with metallic inclusions) — mineraloid (synthetic)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

mineraloid (synthetic)

Veined Sandstone with Calcite Veins (Sedimentary sandstone with hydrothermal/mineral veins) — sedimentary

Veined Sandstone with Calcite Veins

Sedimentary sandstone with hydrothermal/mineral veins

Gray volcanic rock, likely basalt (Basalt; primarily plagioclase feldspar, pyroxene, and minor olivine/iron oxides) — igneous

Gray volcanic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and minor olivine/iron oxides

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

Druzy Quartz Geode (with Chalcedony)

Silicon Dioxide (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Carnelian (Carnelian (SiO2 variant)) — mineral

Carnelian

Carnelian (SiO2 variant)

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

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Desert Rose (Gypsum (Calcium Sulfate Dihydrate) with Sand Inclusions, CaSO4·2H2O) — mineral

Desert Rose

Gypsum (Calcium Sulfate Dihydrate) with Sand Inclusions, CaSO4·2H2O

Galena (likely) (Galena, lead sulfide (PbS)) — mineral

Galena (likely)

Galena, lead sulfide (PbS)

Barite Rose (Barium Sulfate (BaSO4)) — mineral

Barite Rose

Barium Sulfate (BaSO4)

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

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

Ironstone concretion (Iron-oxide-cemented sediment, commonly goethite (FeO(OH)) and hematite (Fe₂O₃)) — sedimentary

Ironstone concretion

Iron-oxide-cemented sediment, commonly goethite (FeO(OH)) and hematite (Fe₂O₃)

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)

Milky Quartz (with Iron Staining) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (with Iron Staining)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Jasper (Red Jasper) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

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

Chalcopyrite in Quartz (Gold-bearing Ore)

CuFeS2 (Chalcopyrite)

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

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)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Hematite

Iron(III) oxide (Fe2O3)

Ironstone concretion (possibly a pyrite-bearing concretion) (Iron-oxide-cemented sedimentary concretion; exact mineral composition cannot be confirmed from the photograph) — sedimentary

Ironstone concretion (possibly a pyrite-bearing concretion)

Iron-oxide-cemented sedimentary concretion; exact mineral composition cannot be confirmed from the photograph

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

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Banded Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Silicon Dioxide (SiO2)

Celestine (Celestite) (Strontium Sulfate (SrSO4)) — mineral

Celestine (Celestite)

Strontium Sulfate (SrSO4)

Red Jasper (River Siltstone) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (River Siltstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Basalt with Jasper Vein (Extrusive Igneous Rock with Quartz/Chalcedony Vein) — igneous

Basalt with Jasper Vein

Extrusive Igneous Rock with Quartz/Chalcedony Vein

Slag (Anthropogenic Glass/Iron byproduct) (Ferro-silicate Slag) — Anthropogenic (Man-made)

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Anthropogenic (Man-made)

Cubic Zirconia (Set in Jewelry) (Zirconium Dioxide (ZrO2)) — gemstone

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Hematite (Ironstone) Nodule

Hematite (Fe2O3)

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

Specular Hematite (Specularite)

Hematite (Fe2O3)