Rock Identifier

Category

Anthropogenic (Man Made Material)

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

Sandstone (Greywacke/Lithic Sandstone) (Arenite / Lithic Sandstone) — sedimentary

Sandstone (Greywacke/Lithic Sandstone)

Arenite / Lithic Sandstone

Chert (Chert / Flint) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (Chert / Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

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

Banded Flint / Chert

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Plagioclase Feldspar (NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)) — mineral

Plagioclase Feldspar

NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)

Coquina / Shelly Limestone (Coquina (calcium carbonate, CaCO3)) — sedimentary

Coquina / Shelly Limestone

Coquina (calcium carbonate, CaCO3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Conglomerate (Conglomerate (Detrital sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Detrital sedimentary rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Bituminous Coal (Organic-rich sedimentary rock (Complex hydrocarbons)) — sedimentary

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Red Jasper (Quartz) (Silicon Dioxide (SiO2) with Iron impurities) — sedimentary

Red Jasper (Quartz)

Silicon Dioxide (SiO2) with Iron impurities

Sandstone (likely Ferruginous) (Arenite (SiO2 based with Fe2O3/FeO(OH) cement)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Septarian Nodule (Septarian Concretion (CaCO3 with Siderite and Calcite/Aragonite infusions)) — sedimentary

Septarian Nodule

Septarian Concretion (CaCO3 with Siderite and Calcite/Aragonite infusions)

Olivine (often within Peridotite) (Magnesium iron silicate, (Mg,Fe)2SiO4) — mineral

Olivine (often within Peridotite)

Magnesium iron silicate, (Mg,Fe)2SiO4

Arfvedsonite in Matrix (Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]) — mineral

Arfvedsonite in Matrix

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary (microcrystalline silicate)

Yellow Jasper

Silicon Dioxide (SiO2)

sedimentary (microcrystalline silicate)

Granite (Granite (Felsic Intrusive)) — igneous

Granite

Granite (Felsic Intrusive)

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

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Aventurine (Aventurine Quartz (SiO2 with inclusions)) — metamorphic

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Chert (variations include Chalcedony and Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations include Chalcedony and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (Banded) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Basalt (Basalt) — igneous

Basalt

Basalt

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Basalt (Vesicular) (Mafic Volcanic Rock (rich in Magnesium and Iron)) — Igneous

Basalt (Vesicular)

Mafic Volcanic Rock (rich in Magnesium and Iron)

Sandstone (Arenite (Siliclastic sedimentary rock, primarily SiO2)) — sedimentary

Sandstone

Arenite (Siliclastic sedimentary rock, primarily SiO2)

Marble (Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)) — metamorphic

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

Serpentine (Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4

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

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Sandstone (Iron-stained) (Clastic sedimentary rock (SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Clastic sedimentary rock (SiO2 with Fe2O3 staining)

Shale or Siltstone (Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)) — sedimentary

Shale or Siltstone

Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)

Andesite (Andesite (intermediate volcanic rock)) — igneous

Andesite

Andesite (intermediate volcanic rock)

Diorite (Intermediate plutonic igneous rock) — Igneous

Diorite

Intermediate plutonic igneous rock

Orthoclase Feldspar (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)