Rock Identifier

Category

Man Made

Browse man made specimens identified by the Rock Identifier community.

Learn about Man Made in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Map Jasper

Mandarin Garnet

Mandarin Garnet

Andalusite

Marl

Coquina

Dunite

Dalmatian Jasper

Dalmatian Jasper

Rock Gypsum

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)

Diamond (in Jewelry) (Carbon (C)) — mineral

Diamond (in Jewelry)

Carbon (C)

Basalt (Basalt) — igneous

Basalt

Basalt

Turquoise (Turquoise, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Diamond (Cubic carbon (C)) — mineral

Diamond

Cubic carbon (C)

Tumbled serpentine (Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximately Mg₃Si₂O₅(OH)₄) — metamorphic

Tumbled serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximately Mg₃Si₂O₅(OH)₄

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

Quartzite (Metamorphic Quartz Sandstone) — metamorphic

Quartzite

Metamorphic Quartz Sandstone

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Mica Schist (Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)) — metamorphic

Mica Schist

Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)

Coquina (Bioclastic Limestone (composed primarily of CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Coquina / Fossiliferous Limestone (Calcareous bioclastic sedimentary rock (CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Calcareous bioclastic sedimentary rock (CaCO3)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Granite (Granite (Plutonic Igneous Rock)) — igneous

Granite

Granite (Plutonic Igneous Rock)

Granite (Granite (Silicic Intrusive Igneous Rock)) — Igneous

Granite

Granite (Silicic Intrusive Igneous Rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granite (Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)) — igneous

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Red glass-like crystal, likely synthetic ruby or red glass (Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass) — gemstone

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

Orgonite Pyramid (containing Amethyst and mixed minerals) (Silicon Dioxide (SiO2) in synthetic resin) — gemstone

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Polished blue-green jasper beads (Jasper, an opaque microcrystalline variety of quartz (SiO₂)) — mineral

Polished blue-green jasper beads

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

Chalcedony (likely blue agate) knapped into an arrowhead (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Chalcedony (likely blue agate) knapped into an arrowhead

Microcrystalline quartz, SiO₂ (chalcedony)

Quartz Sandstone Pebble (Sandstone (SiO2 dominated)) — sedimentary

Quartz Sandstone Pebble

Sandstone (SiO2 dominated)

Tumbled quartz-rich pebble (Microcrystalline quartz (SiO₂), possibly milky quartz or quartzite) — mineral

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly milky quartz or quartzite

Blue-green chrysocolla rough specimen (Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite) — mineral

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Green iridescent glass cabochon or synthetic gemstone (Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone) — gemstone

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

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

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fulgarite (Fulgurite (Lechatelierite / Vitrified Sand)) — igneous

Fulgarite

Fulgurite (Lechatelierite / Vitrified Sand)

Bog Iron / Limonite Concretion (Goethite/Limonite mixture (FeO(OH)·nH2O)) — sedimentary

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Green stone disk, possibly serpentine or jade (Indeterminate from the photograph; candidates include serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄) or jadeite jade (NaAlSi₂O₆).) — mineral

Green stone disk, possibly serpentine or jade

Indeterminate from the photograph; candidates include serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄) or jadeite jade (NaAlSi₂O₆).

Quartzite (Metamorphic Quartz Rock (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz Rock (SiO2)

Red granite boulder (Granite, a coarse-grained felsic intrusive igneous rock; commonly quartz + feldspar + mica) — igneous

Red granite boulder

Granite, a coarse-grained felsic intrusive igneous rock; commonly quartz + feldspar + mica

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Trilobite fossil (Trilobita (exact species indeterminable from the image)) — fossil

Trilobite fossil

Trilobita (exact species indeterminable from the image)

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

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Chert (Microcrystalline silica (SiO2)) — sedimentary

Chert

Microcrystalline silica (SiO2)

Flint (Silicon dioxide (Microcrystalline Quartz / Chert)) — sedimentary

Flint

Silicon dioxide (Microcrystalline Quartz / Chert)

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

Chert (or Flint)

Microcrystalline quartz (SiO2)

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

Chert (Flint / Jasper)

Silicon Dioxide (SiO2)