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

Selenite (Satin Spar) (Gypsum (CaSO4·2H2O)) — mineral

Selenite (Satin Spar)

Gypsum (CaSO4·2H2O)

Quartz-encrusted Matrix (Silicon Dioxide (SiO2) with Ferruginous Sandstone) — sedimentary

Quartz-encrusted Matrix

Silicon Dioxide (SiO2) with Ferruginous Sandstone

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

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ocean Jasper or Orbicular Jasper (SiO2) — mineral

Ocean Jasper or Orbicular Jasper

SiO2

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Carnelian (Silicon Dioxide (Quartz variety), SiO2) — mineral

Carnelian

Silicon Dioxide (Quartz variety), SiO2

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

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Unidentified dark metallic sulfide specimen (Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing) — mineral

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

Sandstone with Iron Staining (Clastic sedimentary rock (SiO2 with iron oxides)) — sedimentary

Sandstone with Iron Staining

Clastic sedimentary rock (SiO2 with iron oxides)

Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2)) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

Aragonite (Aragonite (CaCO3)) — mineral

Aragonite

Aragonite (CaCO3)

Slag (Industrial Byproduct) (Ferrous/Non-ferrous Silicate) — igneous (artificial/anthropogenic)

Slag (Industrial Byproduct)

Ferrous/Non-ferrous Silicate

igneous (artificial/anthropogenic)

Slag (Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)) — igneous (artificial/anthropogenic)

Slag

Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)

igneous (artificial/anthropogenic)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Fossilized Crab Carapace (Concretion) (Decapoda (fossil), typically preserved in calcite or siderite concretion) — sedimentary

Fossilized Crab Carapace (Concretion)

Decapoda (fossil), typically preserved in calcite or siderite concretion

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Goethite (likely as part of Limonite/Ironstone) (Goethite (α-FeOOH)) — Mineral

Goethite (likely as part of Limonite/Ironstone)

Goethite (α-FeOOH)

Amethyst Sage Agate (Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)) — mineral

Amethyst Sage Agate

Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Banded Jasper with Hematite or Quartz (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Jasper with Hematite or Quartz

Silicon Dioxide (SiO2) with impurities

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix) — metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Quartz in Matrix (Silicon Dioxide (SiO2) in host rock matrix) — mineral

Quartz in Matrix

Silicon Dioxide (SiO2) in host rock matrix

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Limonite (Ironstone Concretion) (Limonite (FeO(OH)·nH2O)) — mineral/sedimentary

Limonite (Ironstone Concretion)

Limonite (FeO(OH)·nH2O)

mineral/sedimentary

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Hematite Beads (Hematite (Fe2O3)) — Mineral

Hematite Beads

Hematite (Fe2O3)

Quartz with Sericite and Cinnabar (Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)) — mineral

Quartz with Sericite and Cinnabar

Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)

Chert (Flint) with Limonite Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) with Limonite Staining

Microcrystalline Quartz (SiO2)

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

Banded Iron Formation

BIF (Banded Iron Formation)

Fossilized Bone (Petrified Bone) (Permineralized Vertebrate Remains) — sedimentary

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

White aragonite (coralloid/botryoidal aragonite) (Aragonite, CaCO₃; orthorhombic polymorph of calcite) — mineral

White aragonite (coralloid/botryoidal aragonite)

Aragonite, CaCO₃; orthorhombic polymorph of calcite

Quartz Vein / Quartzite (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Quartzite

Silicon Dioxide (SiO2)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)