Rock Identifier

Category

Anthropogenic (Man Made Material Processed By Nature)

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

Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Emerald Crystal

Emerald Crystal

Orange Obsidian

Diamond

Lavender Obsidian

Electric Blue Obsidian

Tripolite

Violet Obsidian

Conglomerate (Puddingstone) (Conglomerate (specifically, clastic sedimentary rock)) — Sedimentary

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Fuchsite Quartzite (Green Aventurine in raw form) (Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite Quartzite (Green Aventurine in raw form)

Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Porphyritic Basalt (or Andesite) containing Augite (Porphyritic Mafic Volcanic Rock) — igneous

Porphyritic Basalt (or Andesite) containing Augite

Porphyritic Mafic Volcanic Rock

Aragonite Star Cluster (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Porphyritic Basalt (or Porfido / Porphyry Beach Pebble) (Porphyritic Basalt / Andesite) — igneous

Porphyritic Basalt (or Porfido / Porphyry Beach Pebble)

Porphyritic Basalt / Andesite

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Red Sandstone (Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)) — sedimentary

Red Sandstone

Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

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

Chert (Chert Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Yellow Chert (Chert/Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert (Chert/Jasper)

Silicon Dioxide (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Sandstone (Quartzite-leaning) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzite-leaning)

Arenite (primarily SiO2)

Mahogany Obsidian (Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2

Chert (Flint) (Chert (Cryptocrystalline Silica/SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Silica/SiO2)

Chert (Jasper/Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Likely quartz-rich rock fragment (Probably microcrystalline quartz (SiO₂), possibly a pale chert or quartzite fragment) — mineral

Likely quartz-rich rock fragment

Probably microcrystalline quartz (SiO₂), possibly a pale chert or quartzite fragment

Chert (Jasper/Quartzite river pebble) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Jasper/Quartzite river pebble)

Microcrystalline Silica (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Smoky Quartz (Smoky Quartz (SiO2)) — Mineral

Smoky Quartz

Smoky Quartz (SiO2)

Lapis Lazuli (Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)) — Mineral, part of a rock

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Mineral, part of a rock

Coprolite (Fossilized Feces) — sedimentary

Coprolite

Fossilized Feces

Chert (variant of Flint) (Chert (SiO2)) — Sedimentary

Chert (variant of Flint)

Chert (SiO2)

Iron-rich breccia (likely hematite–goethite breccia) (Hematite (Fe₂O₃) and goethite (FeO(OH)) in a silicified or iron-cemented breccia) — sedimentary

Iron-rich breccia (likely hematite–goethite breccia)

Hematite (Fe₂O₃) and goethite (FeO(OH)) in a silicified or iron-cemented breccia

Biotite Schist (Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]) — metamorphic

Biotite Schist

Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]

Rounded greenstone pebble (Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing) — metamorphic

Rounded greenstone pebble

Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing

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

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Red Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Malachite (Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)) — Mineral

Malachite

Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)

Banded Sandstone (Arenite (composed primarily of Quartz: SiO2)) — sedimentary

Banded Sandstone

Arenite (composed primarily of Quartz: SiO2)

Polished limestone or marble slab (Calcite-rich carbonate rock; likely marble (CaCO₃)) — metamorphic

Polished limestone or marble slab

Calcite-rich carbonate rock; likely marble (CaCO₃)

Porphyry (Porphyritic Igneous Rock) — igneous

Porphyry

Porphyritic Igneous Rock

Petrified Wood (Silicified wood (primarily SiO2)) — fossil

Petrified Wood

Silicified wood (primarily SiO2)

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

Sandstone (Ferruginous)

Arenite with Iron-Oxide cement

Ferruginous Conglomerate (Ferruginous Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)