Rock Identifier

Category

Man Made Material

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

Learn about Man Made Material in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Mint Obsidian

Crimson Obsidian

Lherzolite

Violet Obsidian

Tangerine Obsidian

Pastel Obsidian

Lilac Obsidian

Honey calcite (orange calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Cluster (Pipe-like or Candle Quartz Growth) (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster (Pipe-like or Candle Quartz Growth)

Silicon Dioxide (SiO2)

Quartz (Common or Milky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Mica Schist (Mica Schist (Complex Silicate Rock)) — metamorphic

Mica Schist

Mica Schist (Complex Silicate Rock)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Red Sandstone (Arenite (ferruginous sandstone)) — sedimentary

Red Sandstone

Arenite (ferruginous sandstone)

Sandstone (Water-worn Pebble) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Banded agate (likely fire agate or iron-stained chalcedony) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions) — gemstone

Banded agate (likely fire agate or iron-stained chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions

Iron Meteorite (Iron-nickel alloy (e.g., Kamacite, Taenite)) — Meteorite (extraterrestrial material)

Iron Meteorite

Iron-nickel alloy (e.g., Kamacite, Taenite)

Meteorite (extraterrestrial material)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Iron Slag (Ferrous Slag (complex silicate and oxide byproduct)) — industrial byproduct (anthropogenic)

Iron Slag

Ferrous Slag (complex silicate and oxide byproduct)

industrial byproduct (anthropogenic)

Tumbled pink granite or feldspar-rich granitic pebble (Granite, composed mainly of quartz, potassium feldspar, and plagioclase; exact identification is uncertain from the image) — igneous

Tumbled pink granite or feldspar-rich granitic pebble

Granite, composed mainly of quartz, potassium feldspar, and plagioclase; exact identification is uncertain from the image

Black basalt (likely polished or cut fragment) (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, clinopyroxene, and often olivine or magnetite) — igneous

Black basalt (likely polished or cut fragment)

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, clinopyroxene, and often olivine or magnetite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Limestone (with potential fossil inclusions) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with potential fossil inclusions)

Calcium Carbonate (CaCO3)

Granite (Phaneritic Plutonic Felsic Rock (SiO2 > 69%)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (SiO2 > 69%)

Petrified Wood (Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)

Serpentine-rich serpentinite pebble (Serpentinite, composed chiefly of serpentine-group minerals (lizardite, antigorite, chrysotile), commonly with magnetite and minor brucite) — metamorphic

Serpentine-rich serpentinite pebble

Serpentinite, composed chiefly of serpentine-group minerals (lizardite, antigorite, chrysotile), commonly with magnetite and minor brucite

Turquoise (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Tumbled blue quartzite or blue chalcedony (uncertain) (Quartz-rich rock; predominantly silicon dioxide (SiO₂)) — metamorphic

Tumbled blue quartzite or blue chalcedony (uncertain)

Quartz-rich rock; predominantly silicon dioxide (SiO₂)

Chrysocolla-rich copper ore (Chrysocolla, a hydrated copper aluminosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite or turquoise-group minerals) — mineral

Chrysocolla-rich copper ore

Chrysocolla, a hydrated copper aluminosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite or turquoise-group minerals

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Diamond ring (Diamond (crystalline carbon, C)) — gemstone

Diamond ring

Diamond (crystalline carbon, C)

Polished agate/chalcedony fragment (Microcrystalline quartz (SiO₂), likely banded chalcedony or agate) — gemstone

Polished agate/chalcedony fragment

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

River Stone (Limestone) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

River Stone (Limestone)

Sedimentary Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

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

Rose Quartz

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