Rock Identifier

Category

Anthropogenic (Man Made Material Mimicking Sedimentary Rock)

Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.

Learn about Anthropogenic (Man Made Material Mimicking Sedimentary Rock) in the encyclopedia

Rock Gypsum

Limestone

Dunite

Claystone

Diatomite

Tripolite

Sandstone

Marl

Gondite

Lherzolite

Blue Goldstone

Phosphorite

Flint (chert) (Microcrystalline quartz (SiO₂), a variety of chert) — sedimentary

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chintz (Microcrystalline Quartz (SiO2)) — sedimentary

Chintz

Microcrystalline Quartz (SiO2)

Chert (varietal Chalcedony or Flint) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (varietal Chalcedony or Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (likely flint) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (likely flint)

Microcrystalline quartz, SiO₂

Chert (Arrowhead variety) (Chert (SiO2)) — sedimentary

Chert (Arrowhead variety)

Chert (SiO2)

Crushed Limestone (Calcium Carbonate (CaCO3)) — Sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Black beaded bracelet, likely black onyx or glass (Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass) — mineral

Black beaded bracelet, likely black onyx or glass

Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass

Likely clear quartz crystal or glass-like gemstone (Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image) — mineral

Likely clear quartz crystal or glass-like gemstone

Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image

Chert (varietal Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (varietal Flint)

Microcrystalline quartz (SiO2)

Chert (Flint) (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Silica, SiO2)

Metallic sulfide mineral fragment, likely galena (Galena (lead sulfide, PbS), tentative identification) — mineral

Metallic sulfide mineral fragment, likely galena

Galena (lead sulfide, PbS), tentative identification

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Blue sea glass or blue glassy mineral fragment (Uncertain; likely man-made soda-lime glass, not a natural mineral) — mineral

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Gold ring with a dark, possibly gemstone setting (Gold alloy; the dark setting is not identifiable from the image) — gemstone

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Green glassy slag (often sold as “sea glass” or “green obsidian”) (Industrial vitreous slag; primarily amorphous silicate glass, composition variable) — mineral

Green glassy slag (often sold as “sea glass” or “green obsidian”)

Industrial vitreous slag; primarily amorphous silicate glass, composition variable

Chert (Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2)

Glass / Silicon Dioxide (Man-made) (SiO2 (Amorphous Silicon Dioxide)) — Amorphous Solid

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Amorphous Solid

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Man-made Blank Ammunition (Brass) (CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)) — Anticrystalline / Synthetic Alloy

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Anticrystalline / Synthetic Alloy

Likely chert (flint) (Microcrystalline quartz (SiO₂), likely chert; exact identification is uncertain from the image alone) — sedimentary

Likely chert (flint)

Microcrystalline quartz (SiO₂), likely chert; exact identification is uncertain from the image alone

Green Agate (Silicon dioxide (SiO₂)) — mineral

Green Agate

Silicon dioxide (SiO₂)

Tumbled yellow chalcedony (possibly citrine or pale agate) (Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually) — mineral

Tumbled yellow chalcedony (possibly citrine or pale agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually

Possible weathered basalt or slag fragment (Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image) — igneous

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Chert (Arrowhead/Tool variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)

Hematite Beads (Hematite (Fe2O3)) — Mineral

Hematite Beads

Hematite (Fe2O3)

Man-made Glass (Tumbled/Shaped) (Amorphous Silicon Dioxide (SiO2) with metal oxide colorants) — Mineraloid (synthetic)

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Mineraloid (synthetic)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Asphalt (Bituminous Concrete) (Bituminous Concrete / Pavement) — man-made (synthetic rock)

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

man-made (synthetic rock)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Opalite (a synthetic glass, often confused with Opal) (Silicon dioxide glass (SiO2nH2O, for natural opal)) — Synthetic (glass)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Synthetic (glass)

Coquina (Bioclastic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Polished stone sphere, possibly agate or jasper (Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image) — mineral

Polished stone sphere, possibly agate or jasper

Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image

Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Flint

Microcrystalline Quartz (SiO2)

Possible sea glass (naturally frosted glass), not a confirmed geological specimen (Man-made silicate glass; composition varies, commonly soda-lime glass) — mineral

Possible sea glass (naturally frosted glass), not a confirmed geological specimen

Man-made silicate glass; composition varies, commonly soda-lime glass

Sandstone (Quartzose) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Vesicular basalt (possibly slag-contaminated) (Basalt; chiefly plagioclase and pyroxene, with possible olivine and secondary minerals) — igneous

Vesicular basalt (possibly slag-contaminated)

Basalt; chiefly plagioclase and pyroxene, with possible olivine and secondary minerals

Greenstone (Metabasalt / Metavolcanic rock) — metamorphic

Greenstone

Metabasalt / Metavolcanic rock

Sandstone Concretion (Sedimentary concretion) — Sedimentary

Sandstone Concretion

Sedimentary concretion

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Dark gneiss or migmatitic amphibolite (Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite) — metamorphic

Dark gneiss or migmatitic amphibolite

Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite