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

Aluminum Slag (Anthropogenic Aluminum (Al)) — mineral

Aluminum Slag

Anthropogenic Aluminum (Al)

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Unidentified dark, flat specimen (Indeterminate; image resolution is insufficient for mineral identification) — mineral

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Rose Quartz (Silicon Dioxide (SiO2) containing trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) containing trace amounts of titanium, iron, or manganese

Concrete rubble (Anthropogenic conglomerate) — sedimentary

Concrete rubble

Anthropogenic conglomerate

Asphalt concrete (Anthropogenic conglomerate) — sedimentary

Asphalt concrete

Anthropogenic conglomerate

Flint/chert projectile point (Microcrystalline quartz (SiO₂), archaeologically worked into a bifacial point) — sedimentary

Flint/chert projectile point

Microcrystalline quartz (SiO₂), archaeologically worked into a bifacial point

Ferruginous Sandstone (Ironstone) (Sandstone with Hematite/Goethite cement (SiO2 + FeO(OH))) — sedimentary

Ferruginous Sandstone (Ironstone)

Sandstone with Hematite/Goethite cement (SiO2 + FeO(OH))

N/A - Image does not contain a rock or mineral (Anthropogenic textile material) — Non-geological

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Wishing Rock (Quartz Vein in Host Rock) (Silicon dioxide (SiO2) vein in various host rocks) — Igneous/Sedimentary/Metamorphic with Mineral Vein

Wishing Rock (Quartz Vein in Host Rock)

Silicon dioxide (SiO2) vein in various host rocks

Igneous/Sedimentary/Metamorphic with Mineral Vein

Sandstone (likely Ferruginous) (Sandstone (SiO2 with iron oxides)) — sedimentary

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Fossil bivalve shell (Fossilized or partially mineralized bivalve; exact genus cannot be determined from the image) — fossil

Fossil bivalve shell

Fossilized or partially mineralized bivalve; exact genus cannot be determined from the image

Kidney Stone (Medical Specimen) (Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O) — Mineral (Biogenic)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Mineral (Biogenic)

Sandstone (Arenite (primarily Quartz Sandstone)) — sedimentary

Sandstone

Arenite (primarily Quartz Sandstone)

Glauconitic Sandstone (or Greenstone) (Glauconitic Sandstone with Quartz) — sedimentary

Glauconitic Sandstone (or Greenstone)

Glauconitic Sandstone with Quartz

Slag (Anthropogenic glassy silicate) — Mineral-like byproduct

Slag

Anthropogenic glassy silicate

Mineral-like byproduct

Chert / Flint Tool (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint Tool

Cryptocrystalline quartz (SiO2)

Chert / Flint (Artifact) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint (Artifact)

Microcrystalline Quartz (SiO2)

Chert / Flint Arrowhead (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint Arrowhead

Microcrystalline Quartz (SiO2)

Aggregate Concrete (Anthropogenic Conglomerate (Technosol)) — sedimentary

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Pyrite in Matrix (likely Quartz or Schist matrix) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite and Sunstone (Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)) — mineral

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

Kidney Stone (Calcium Oxalate (CaC2O4), Uric Acid, or Struvite) — mineral

Kidney Stone

Calcium Oxalate (CaC2O4), Uric Acid, or Struvite

Nickel coin (U.S. currency) (Cupronickel (75% Copper, 25% Nickel alloy)) — man-made alloy (metallic)

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

man-made alloy (metallic)

Asphalt (Bituminous Concrete) (Bituminous mix / Anthropogenic conglomerate) — man-made composite (lithified equivalent of sedimentary)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

man-made composite (lithified equivalent of sedimentary)

Slag (Anthropogenic Iron Silicate Glass) — mineral

Slag

Anthropogenic Iron Silicate Glass

Slag Glass (Anthropogenic Amorphous Silicon Dioxide) — mineral

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Blue Slag Glass (Anthropogenic Amorphous Silicon Dioxide) — mineral

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Blue Glass or Slag Glass (Amorphous Silica (Anthropogenic Glass)) — mineral

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Asphalt Concrete (Bituminous Concrete / Asphaltic Composite) — not a natural rock (man-made composite)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

not a natural rock (man-made composite)

Sodium Polyacrylate (Superabsorbent Polymer) (Sodium Polyacrylate [-CH2-CH(COONa)-]n) — mineral (synthetic)

Sodium Polyacrylate (Superabsorbent Polymer)

Sodium Polyacrylate [-CH2-CH(COONa)-]n

mineral (synthetic)

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) in Carbonate Matrix) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) in Carbonate Matrix

Anthropogenic Heat Source (Electronic/Industrial Interface) (Thermal IR emission (Electronic infrastructure)) — not a rock or mineral

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

not a rock or mineral

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Sandstone (Water-worn Cobble) (Arenite (variable composition, primarily SiO2)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Vesicular Basalt (Aphanitic Mafic Volcanic Rock) — igneous

Vesicular Basalt

Aphanitic Mafic Volcanic Rock

Chert (Flint variety) (Microcrystalline context of Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Shale or Slate with Quartz Veins (Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins) — Metamorphic, likely Sedimentary with Quartz veins

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Metamorphic, likely Sedimentary with Quartz veins

Green Slag Glass (Amorphous Silica Glass (Anthropogenic)) — Industrial byproduct (often mistaken for obsidian or mineral)

Green Slag Glass

Amorphous Silica Glass (Anthropogenic)

Industrial byproduct (often mistaken for obsidian or mineral)

Amethyst (rough crystal) (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation) — gemstone

Amethyst (rough crystal)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Rounded gray stone, likely quartz-rich granitic rock (Probable granite or granitic gneiss; mainly quartz, feldspar, and mica) — igneous

Rounded gray stone, likely quartz-rich granitic rock

Probable granite or granitic gneiss; mainly quartz, feldspar, and mica