Rock Identifier

Category

Sedimentary (Man Made)

Browse sedimentary (man made) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Man Made) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Limestone

Claystone

Sandstone

Marl

Rock Gypsum

Tripolite

Zincite

Diatomite

Lherzolite

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

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

Brecciated jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide staining) — sedimentary

Brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide staining

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

Chert (Flint / Quartz Nodule)

Microcrystalline Quartz (SiO2)

Coquina and Oyster Fossil Rock (Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells) — fossil

Coquina and Oyster Fossil Rock

Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells

Chert (Yellow Jasper/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Likely sandstone pebble (Quartz-rich sandstone (composition uncertain from the image)) — sedimentary

Likely sandstone pebble

Quartz-rich sandstone (composition uncertain from the image)

Likely flint (dark chert) (Microcrystalline quartz (SiO₂), commonly called chert or flint) — sedimentary

Likely flint (dark chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Chert or Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Chert or Jasper

Microcrystalline Quartz (SiO2)

Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Sandstone (Arenite (SiO2, often with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone

Arenite (SiO2, often with CaCO3 or Fe2O3 cement)

Chert (likely jasper/chalcedony-rich chert) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (likely jasper/chalcedony-rich chert)

Microcrystalline quartz, SiO₂

Sandstone (specifically Arkose or Quartz Arenite) (Arenite (primarily SiO2 with possible Feldspar)) — sedimentary

Sandstone (specifically Arkose or Quartz Arenite)

Arenite (primarily SiO2 with possible Feldspar)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Flint (Silicon dioxide (SiO2)) — sedimentary

Flint

Silicon dioxide (SiO2)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Green glassy mineral specimen, likely rough emerald or green fluorite (Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph) — mineral

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Chert (often called Flint) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Cryptocrystalline Quartz, SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Tumbled cream-colored pebble (Likely quartz-rich sandstone or limestone; exact identification requires testing) — sedimentary

Tumbled cream-colored pebble

Likely quartz-rich sandstone or limestone; exact identification requires testing

Chert (Siltstone / Flint) (SiO2 (Cryptocrystalline Quartz)) — sedimentary

Chert (Siltstone / Flint)

SiO2 (Cryptocrystalline Quartz)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Porous limestone (likely fossiliferous or weathered limestone) (Calcite-rich limestone; chiefly calcium carbonate (CaCO₃)) — sedimentary

Porous limestone (likely fossiliferous or weathered limestone)

Calcite-rich limestone; chiefly calcium carbonate (CaCO₃)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

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

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Chert (with Quartz) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Quartz)

Microcrystalline Quartz (SiO2)

Chalk (Micrite (primarily Calcium Carbonate or CaCO3)) — sedimentary

Chalk

Micrite (primarily Calcium Carbonate or CaCO3)

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks (Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock) — sedimentary

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Sandstone (Arenite (siliciclastic sedimentary rock composed mostly of quartz)) — sedimentary

Sandstone

Arenite (siliciclastic sedimentary rock composed mostly of quartz)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Likely flint pebble (possibly a worked flint fragment) (Microcrystalline quartz (chalcedony), SiO₂; commonly called flint) — sedimentary

Likely flint pebble (possibly a worked flint fragment)

Microcrystalline quartz (chalcedony), SiO₂; commonly called flint

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

Chert / Flint

Silicon Dioxide (SiO2)

Chert Arrowhead (Jasper) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert Arrowhead (Jasper)

Chert (Cryptocrystalline Quartz, SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Chert (Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chalcedony / milky quartz flake (Microcrystalline quartz (SiO₂), likely chalcedony; possibly a worked quartzite or chert fragment) — mineral

Chalcedony / milky quartz flake

Microcrystalline quartz (SiO₂), likely chalcedony; possibly a worked quartzite or chert fragment

Sandstone (Sandstone (Quartz-rich Arenite / SiO2)) — sedimentary

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Sandstone (Water-worn Cobble) (Arenite (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Flint (chert) hand axe (Cryptocrystalline silica (SiO₂), worked into a bifacial stone tool) — sedimentary

Flint (chert) hand axe

Cryptocrystalline silica (SiO₂), worked into a bifacial stone tool

Fossiliferous Limestone with Crinoid Stem (Sedimentary Rock with Crinoidea Fossil) — fossil

Fossiliferous Limestone with Crinoid Stem

Sedimentary Rock with Crinoidea Fossil