Rock Identifier

Category

Anthropogenic Specimen (Man Made)

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

Quartz Pebble (Geode-like) (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble (Geode-like)

Silicon Dioxide (SiO2)

Mineral
Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

mineral
Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

sedimentary
Dendritic Agate or Spotted Quartzite (Silicon Dioxide (SiO2) with inclusions) — metamorphic

Dendritic Agate or Spotted Quartzite

Silicon Dioxide (SiO2) with inclusions

metamorphic
Quartz Druzy (on Matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy (on Matrix)

Silicon Dioxide (SiO2)

mineral
Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

sedimentary
Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary
Jasper and Ironstone (likely Jasperized Ironstone) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Jasper and Ironstone (likely Jasperized Ironstone)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

sedimentary
Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral
Rough Diamond (Diamond (Native Element Carbon, C)) — mineral

Rough Diamond

Diamond (Native Element Carbon, C)

mineral
Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

igneous
Sunstone (Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)

mineral
Amazonite (Amazonite (KAlSi3O8); a green variety of Microcline feldspar) — mineral

Amazonite

Amazonite (KAlSi3O8); a green variety of Microcline feldspar

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

Labradorite

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

igneous
Fulgurite (Fulgurite (Lechatelierite), amorphous SiO2) — metamorphic

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

metamorphic
Yellow Quartz (Citrine Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

mineral
Gneiss (specifically a water-worn pebble) (Gneiss) — metamorphic

Gneiss (specifically a water-worn pebble)

Gneiss

metamorphic
Granite Pebble (Felsic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Felsic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)

igneous
Sandstone (Calcareous Sandstone) (Calcareous Sandstone (primarily SiO2 with CaCO3 cement)) — sedimentary

Sandstone (Calcareous Sandstone)

Calcareous Sandstone (primarily SiO2 with CaCO3 cement)

sedimentary
Quartzite River Cobble (Quartzite (SiO2)) — metamorphic

Quartzite River Cobble

Quartzite (SiO2)

metamorphic
Banded Agate (Lake Superior Agate type) (Agate (Cryptocrystalline Variety of Quartz, SiO2)) — mineral

Banded Agate (Lake Superior Agate type)

Agate (Cryptocrystalline Variety of Quartz, SiO2)

mineral
Pyrite (on Shale/Matrix) (Iron Disulfide (FeS2)) — mineral

Pyrite (on Shale/Matrix)

Iron Disulfide (FeS2)

mineral
Granodiorite Core (Granodiorite) — igneous

Granodiorite Core

Granodiorite

igneous
Chert (Common Opal/Agate inclusion) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

sedimentary
Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

igneous
Granodiorite (River Pebble) (Granodiorite) — igneous

Granodiorite (River Pebble)

Granodiorite

igneous
Basalt (with possible weathering or secondary mineral crust) (Basalt (Aphanitic Mafic Igneous Rock)) — Igneous

Basalt (with possible weathering or secondary mineral crust)

Basalt (Aphanitic Mafic Igneous Rock)

Igneous
Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

igneous
Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

igneous
Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

igneous
Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

igneous
Limestone (Sedimentary rock composed of Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)

sedimentary
Yellow Quartz (Citrine type/Tumbled Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine type/Tumbled Quartz)

Silicon Dioxide (SiO2)

mineral
Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

metamorphic
Green Calcite (Onyx Marble) (Calcium Carbonate (CaCO3)) — mineral

Green Calcite (Onyx Marble)

Calcium Carbonate (CaCO3)

mineral
Quartzite Pebble (Quartzite) — metamorphic

Quartzite Pebble

Quartzite

metamorphic
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

mineral
Sandstone (Quartzite Pebble) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (SiO2)

sedimentary
Chert (Field Stone) (Chert (SiO2)) — sedimentary

Chert (Field Stone)

Chert (SiO2)

sedimentary
Yellow Chert or Jasper (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions

sedimentary
Granite or Granodiorite (Weathered) (Granite) — Igneous

Granite or Granodiorite (Weathered)

Granite

Igneous