Rock Identifier

Category

Man Made Material (Constructed)

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

Learn about Man Made Material (Constructed) in the encyclopedia

Opalite

Peat

Map Jasper

Goldstone

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Dunite

Andalusite

Zincite

Marl

Limonite

Shell Opal

Diamond (as set in a gold ring) (Carbon (C)) — mineral

Diamond (as set in a gold ring)

Carbon (C)

Polished jasper pebble (Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions) — mineral

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

White pebbles (rock material not identifiable from the image) (Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock) — sedimentary

White pebbles (rock material not identifiable from the image)

Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Malachite (Malachite, Cu₂CO₃(OH)₂; a banded botryoidal copper carbonate specimen) — mineral

Malachite

Malachite, Cu₂CO₃(OH)₂; a banded botryoidal copper carbonate specimen

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

Chert (Flint)

Silicon Dioxide (SiO2)

Limpets Shell / Fossil Specimen (Patellogastropoda (Class)) — fossil

Limpets Shell / Fossil Specimen

Patellogastropoda (Class)

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

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Chert (varietal: Flint/Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (varietal: Flint/Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Flint Arrowhead) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Coquina (Fossiliferous Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Carved yellow stone butterfly (Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone) — mineral

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Chert (flint) fragment (Microcrystalline quartz (SiO₂), commonly called chert or flint) — sedimentary

Chert (flint) fragment

Microcrystalline quartz (SiO₂), commonly called chert or flint

Unidentified gray stone/concrete-like fragment (Indeterminate; likely a fine-grained carbonate or cementitious geological fragment) — sedimentary

Unidentified gray stone/concrete-like fragment

Indeterminate; likely a fine-grained carbonate or cementitious geological fragment

Jasper / Chert (Red) (Cryptocrystalline quartz (SiO2)) — Sedimentary / Mineral

Jasper / Chert (Red)

Cryptocrystalline quartz (SiO2)

Sedimentary / Mineral

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

Pink Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Sandstone (with possibly iron oxides and other minerals) (Sandstone) — Sedimentary rock

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Sedimentary rock

Tumbled fossil shark tooth pendant (Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image) — fossil

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Gemstone ring (stones not reliably identifiable from the image) (Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually) — gemstone

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Polished, carved gemstone (possibly dyed agate or glass-like material) (Unconfirmed from the image; no specific mineral can be identified reliably) — gemstone

Polished, carved gemstone (possibly dyed agate or glass-like material)

Unconfirmed from the image; no specific mineral can be identified reliably

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Rounded gray pebble, likely quartzite (Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image) — metamorphic

Rounded gray pebble, likely quartzite

Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image

Weathered concrete or cementitious slab (not natural rock) (Artificial calcium-silicate cement composite; likely Portland cement concrete) — sedimentary

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Diamond (Cut jewelry specimen) (Diamond (pure Carbon, C)) — mineral

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Greenstone (Metabasalt / Metavolcanic rock) — metamorphic

Greenstone

Metabasalt / Metavolcanic rock

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

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

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)

Man-made Green Quartz (Lab-grown or Treated) (Silicon Dioxide (SiO2) with artificial coloration) — mineral

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Yellow faceted gemstone, likely citrine or yellow sapphire (Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)) — gemstone

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Coquina (Biogenic Limestone (mostly Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Limestone with Fossil Inclusions (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone with Fossil Inclusions

Sedimentary Carbonate Rock (CaCO3)

Coquina / Fossiliferous Limestone (Fossiliferous Limestone / CaCO3) — sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone / CaCO3

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 / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock