Rock Identifier

Category

Anthropogenic (Man Made Material)

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

Learn about Anthropogenic (Man Made Material) in the encyclopedia

Opalite

Goldstone

Peat

Map Jasper

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Dunite

Andalusite

Zincite

Marl

Limonite

Diamond

Tumbled jasper or brecciated jasper (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and dark mineral inclusions) — mineral

Tumbled jasper or brecciated jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and dark mineral inclusions

Red jasper (likely brecciated jasper) (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red jasper (likely brecciated jasper)

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Sandstone (Tumbled / Rounded) (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone (Tumbled / Rounded)

Sedimentary Rock (Quartz arenite)

Quartzite Pebble (Metamorphosed Quartz Arenite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Arenite (SiO2)

Flint (SiO2 (Cryptocrystalline Quartz)) — sedimentary

Flint

SiO2 (Cryptocrystalline Quartz)

Flint (SiO2 (Microcrystalline Quartz)) — sedimentary

Flint

SiO2 (Microcrystalline Quartz)

Flint (or Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Flint (or Chert)

Microcrystalline quartz (SiO2)

Dark river pebble, likely basalt or fine-grained volcanic rock (Basalt (probable); mostly plagioclase and pyroxene, with possible magnetite) — igneous

Dark river pebble, likely basalt or fine-grained volcanic rock

Basalt (probable); mostly plagioclase and pyroxene, with possible magnetite

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Fossil Snail (Gastropoda (fossilized)) — fossil

Fossil Snail

Gastropoda (fossilized)

Fossil Snail (Gastropoda (fossilized)) — fossil

Fossil Snail

Gastropoda (fossilized)

Mammoth Molar Fossil (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Molar Fossil

Mammuthus primigenius (Tooth fragment)

Jasper (Silicon dioxide (SiO2) with impurities, microcrystalline quartz) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities, microcrystalline quartz

Goethite / Limonite Concretion (Iron Hydroxide Oxide (FeO(OH))) — sedimentary

Goethite / Limonite Concretion

Iron Hydroxide Oxide (FeO(OH))

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

Chert (Flint) Nodule

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Limonite (Limonite (FeOO·nH2O)) — mineral

Limonite

Limonite (FeOO·nH2O)

Chert (with Limestone matrix) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Limestone matrix)

Microcrystalline Quartz (SiO2)

Travertine (Tufa) (Travertine (Aragonite/Calcite form of Calcium Carbonate, CaCO3)) — sedimentary

Travertine (Tufa)

Travertine (Aragonite/Calcite form of Calcium Carbonate, CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Serpentinite (Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and minor talc) — metamorphic

Serpentinite

Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and minor talc

Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony), SiO2

Amethyst cluster (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation) — mineral

Amethyst cluster

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Amethyst geode fragment (Quartz, SiO₂; purple color from irradiation-related iron impurities) — mineral

Amethyst geode fragment

Quartz, SiO₂; purple color from irradiation-related iron impurities

Fossiliferous Flint (Microcrystalline Quartz (SiO2) with Echinoid Fossil) — sedimentary

Fossiliferous Flint

Microcrystalline Quartz (SiO2) with Echinoid Fossil

Chrysocolla in Quartz (Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)) — mineral

Chrysocolla in Quartz

Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)

Travertine (Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Calcium Carbonate (CaCO3)

Tiger's Eye (Quartz pseudomorph after crocidolite (SiO2)) — gemstone

Tiger's Eye

Quartz pseudomorph after crocidolite (SiO2)

Flint (Silicon dioxide (Cryptocrystalline Quartz, SiO2)) — sedimentary

Flint

Silicon dioxide (Cryptocrystalline Quartz, SiO2)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Flint nodules in Limestone) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint nodules in Limestone)

Silicon dioxide (SiO2)

Slate (Foliated Metamorphic Rock (composed of quartz, illite, chlorite)) — metamorphic

Slate

Foliated Metamorphic Rock (composed of quartz, illite, chlorite)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Black Obsidian (Amorphous volcanic glass (primarily SiO2)) — igneous

Black Obsidian

Amorphous volcanic glass (primarily SiO2)

Diamond (or Simulant) (Carbon (C) or various simulants (e.g., Cubic Zirconia)) — gemstone

Diamond (or Simulant)

Carbon (C) or various simulants (e.g., Cubic Zirconia)

Diamond (or Diamond Simulant) (Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Tiger's Eye and Gemstone Assortment (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)) — metamorphic

Tiger's Eye and Gemstone Assortment

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)