Rock Identifier

Category

Anthropogenic Specimen (Man Made Material)

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

Olivine (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Limonite (Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O) — mineral

Limonite

Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Red Sandstone (Arenite (primarily Quartz with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Iron Oxide)

Red Granite (Phaneritic Plutonic Rock (High Potassium Feldspar)) — igneous

Red Granite

Phaneritic Plutonic Rock (High Potassium Feldspar)

Chert (Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chondrite Meteorite (Ordinary Chondrite (S-type asteroid origin)) — igneous

Chondrite Meteorite

Ordinary Chondrite (S-type asteroid origin)

Ferruginous Sandstone (Ironstone) (Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)) — sedimentary

Ferruginous Sandstone (Ironstone)

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Chert (Microcrystalline silica (SiO2)) — sedimentary

Chert

Microcrystalline silica (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Iron Ore / Ironstone Concretion (Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.) — Mineral, specifically an iron ore

Iron Ore / Ironstone Concretion

Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.

Mineral, specifically an iron ore

Ruby in Kyanite (Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)) — metamorphic

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Chert / Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Diamond (Macled/Crystal fragment) (Carbon (C), isometric crystal system) — mineral

Diamond (Macled/Crystal fragment)

Carbon (C), isometric crystal system

Obsidian (Obsidian (Volcanic Glass; SiO2 content > 70%)) — igneous

Obsidian

Obsidian (Volcanic Glass; SiO2 content > 70%)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (likely Quartz Sandstone) (Arenite (SiO2 based)) — sedimentary

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)

Chert (specifically Flint or Jasper variant) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

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

Sandstone

Arenite (primarily Quartz, SiO2)

Banded Iron Formation (Jaspillite) (Banded Iron Formation (BIF) / Jaspillite) — sedimentary

Banded Iron Formation (Jaspillite)

Banded Iron Formation (BIF) / Jaspillite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Mica Schist (Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Sandstone (Red) (Arenite (Fe2O3 heavy)) — sedimentary

Sandstone (Red)

Arenite (Fe2O3 heavy)

Chert (specifically Yellow/Tan Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Yellow/Tan Chert)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron inclusions

Labradorite (Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8) — mineral

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Thunderegg (Agetized Geode nodule) (Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)) — igneous

Thunderegg (Agetized Geode nodule)

Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)

Chert (variously known as Flint or Microcrystalline Quartz) (Silicon dioxide (SiO2)) — sedimentary

Chert (variously known as Flint or Microcrystalline Quartz)

Silicon dioxide (SiO2)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Chert (varietal Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (varietal Flint or Jasper)

Silicon Dioxide (SiO2)

Uraninite (Pitchblende) (Uranium dioxide (UO2)) — mineral

Uraninite (Pitchblende)

Uranium dioxide (UO2)

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

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Limonite-stained Chert (Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)) — sedimentary

Limonite-stained Chert

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Red Jasper (Quartz (Silicon Dioxide) with Iron Oxide impurities (Fe2O3)) — mineralological specimen

Red Jasper

Quartz (Silicon Dioxide) with Iron Oxide impurities (Fe2O3)

mineralological specimen

Slate (Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)) — metamorphic

Slate

Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)

Chert / Flint (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert / Flint

Chert (Cryptocrystalline Quartz, SiO2)

Banded Chert (River Siltstone) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Siltstone)

Microcrystalline Quartz (SiO2)

Chert (specifically Gray Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Gray Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)