Rock Identifier

Category

Man Made Object (Metalwork)

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

Learn about Man Made Object (Metalwork) in the encyclopedia

Opalite

Map Jasper

Goldstone

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Andalusite

Zincite

Marl

Coquina

Dunite

Dalmatian Jasper

Dalmatian Jasper

Rock Gypsum

Serpentinite (likely) (Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and minor chlorite/talc) — metamorphic

Serpentinite (likely)

Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and minor chlorite/talc

Phantom Quartz with Chlorite and Hematite inclusions (Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)) — mineral

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Tumbled serpentine (likely) (Serpentine-group minerals, commonly antigorite or lizardite; approximate formula Mg₃Si₂O₅(OH)₄) — mineral

Tumbled serpentine (likely)

Serpentine-group minerals, commonly antigorite or lizardite; approximate formula Mg₃Si₂O₅(OH)₄

Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Lava Rock (Scoria) (Scoria (Vesicular Basalt)) — igneous

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

Quartz Vein in Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Vein in Matrix

Silicon Dioxide (SiO2)

Basalt (Vesicular) (Basalt (Extrusive Igneous)) — igneous

Basalt (Vesicular)

Basalt (Extrusive Igneous)

Greenstone (Greenschist) (Greenschist (composed of Chlorite, Epidote, and Actinolite)) — metamorphic

Greenstone (Greenschist)

Greenschist (composed of Chlorite, Epidote, and Actinolite)

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

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Biotite-bearing granite or granitic gneiss (Quartz–feldspar–biotite assemblage; possibly metamorphosed granite (gneiss)) — igneous

Biotite-bearing granite or granitic gneiss

Quartz–feldspar–biotite assemblage; possibly metamorphosed granite (gneiss)

Coral Fossil (Fossilized Coral) (Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)) — fossil

Coral Fossil (Fossilized Coral)

Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granitoid (Common Granite/Gneiss) (Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)) — igneous

Granitoid (Common Granite/Gneiss)

Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)

Serpentinite (Serpentine group minerals ((Mg, Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentine group minerals ((Mg, Fe)3Si2O5(OH)4)

Granite (Granite (Phaneritic Quartz-Feldspar Plutonic Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

White Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Quartzite Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble (Quartzite Pebble)

Silicon Dioxide (SiO2)

Rough Emerald (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — gemstone

Rough Emerald

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Greenstone (Greenschist) — metamorphic

Greenstone

Greenschist

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Blue Sapphire (Corundum (Al2O3 with trace Titanium and Iron)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Greenstone (Metabasalt (Greenstone facies)) — metamorphic

Greenstone

Metabasalt (Greenstone facies)

Ferruginous Quartz (Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Obsidian (Volcanic Glass (SiO2 - Silicon Dioxide with impurities)) — igneous

Obsidian

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — Igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Howlite (Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Iron-rich quartzite or ironstone fragment (Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite) — metamorphic

Iron-rich quartzite or ironstone fragment

Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite

Sandstone (Quartz arenite / Lithic sandstone) — sedimentary

Sandstone

Quartz arenite / Lithic sandstone

Moss Agate (Chalcedony (SiO2 with inclusions)) — mineral

Moss Agate

Chalcedony (SiO2 with inclusions)

Moqui Marble (Shaman Stone) (Iron Oxide Concretion (Limonite/Hematite over Sandstone)) — sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Limonite/Hematite over Sandstone)

Green Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Gneiss (Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica) — metamorphic

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Weathered granitic rock (Granite or granodiorite; primarily quartz (SiO₂), feldspar, and mica) — igneous

Weathered granitic rock

Granite or granodiorite; primarily quartz (SiO₂), feldspar, and mica

Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Scoria (Volcanic Cinder) (Extrusive Igneous Rock) — igneous

Scoria (Volcanic Cinder)

Extrusive Igneous Rock