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

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite with Iron Oxide (Fe2O3) cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — Igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Sandstone (with Liesegang rings or Oxidation) (Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)) — sedimentary

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Green Kyanite (Kyanite (Al2SiO5)) — mineral

Green Kyanite

Kyanite (Al2SiO5)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrites) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Milky Quartz (Water-worn pebble) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz (Water-worn pebble)

Quartz (Silicon Dioxide, SiO2)

Quartz (specifically Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Coquina / Shelly Limestone (Bioclastic Limestone (composed of CaCO3)) — sedimentary

Coquina / Shelly Limestone

Bioclastic Limestone (composed of CaCO3)

Fine-grained dark igneous rock, likely basalt (Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and iron-titanium oxides) — igneous

Fine-grained dark igneous rock, likely basalt

Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and iron-titanium oxides

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (likely Graywacke or Arkosic varieties) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Fossiliferous Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Sandstone (Arenite (primarily composed of SiO2)) — sedimentary

Sandstone

Arenite (primarily composed of SiO2)

Quartzite (Milky Quartz Cobble) (Silicon Dioxide (SiO2)) — Metamorphic

Quartzite (Milky Quartz Cobble)

Silicon Dioxide (SiO2)

Rough Diamond (Carbon (C)) — mineral

Rough Diamond

Carbon (C)

Dark vesicular volcanic rock, likely basaltic scoria (Scoria (vesicular basalt; composition commonly plagioclase, pyroxene, and iron-rich glass)) — igneous

Dark vesicular volcanic rock, likely basaltic scoria

Scoria (vesicular basalt; composition commonly plagioclase, pyroxene, and iron-rich glass)

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

Emerald (Rough)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Diamond (Cubic Carbon (C)) — mineral

Diamond

Cubic Carbon (C)

Dark basalt or fine-grained mafic rock (Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine or iron-titanium oxides) — igneous

Dark basalt or fine-grained mafic rock

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine or iron-titanium oxides

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone Pebble (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 dominant)) — sedimentary

Sandstone

Arenite (SiO2 dominant)

Micaceous schist (likely biotite schist) (Schist dominated by biotite mica, quartz, and feldspar) — metamorphic

Micaceous schist (likely biotite schist)

Schist dominated by biotite mica, quartz, and feldspar

Quartz–feldspar pegmatite with garnet (Granitic pegmatite; chiefly quartz (SiO₂), feldspar, mica, and reddish-brown almandine garnet) — igneous

Quartz–feldspar pegmatite with garnet

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, mica, and reddish-brown almandine garnet

Tumbled greenstone (likely serpentine) (Serpentinite; mainly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile) — metamorphic

Tumbled greenstone (likely serpentine)

Serpentinite; mainly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile

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

Rose Quartz

Quartz (Silicon Dioxide - SiO2)

Ironstone Concretion / Limonite Node (Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)) — sedimentary

Ironstone Concretion / Limonite Node

Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Serpentinite (likely serpentinized ultramafic rock) (Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite) — metamorphic

Serpentinite (likely serpentinized ultramafic rock)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite

Diamond (in Ring Setting) (Diamond (C)) — gemstone

Diamond (in Ring Setting)

Diamond (C)