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

Moonstone (Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions) — mineral

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions

Diorite (Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)) — igneous

Diorite

Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Silver (Jewelry form) (Native Silver (Ag)) — mineral

Silver (Jewelry form)

Native Silver (Ag)

Breccia (Breccia) — sedimentary

Breccia

Breccia

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

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Diorite (Diorite (Plagioclase feldspar and amphibole/biotite)) — igneous

Diorite

Diorite (Plagioclase feldspar and amphibole/biotite)

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

Chert / Flint

Microcrystalline Quartz (SiO2)

Black Chert River Stone (Cryptocrystalline Quartz (SiO2)) — sedimentary

Black Chert River Stone

Cryptocrystalline Quartz (SiO2)

Malachite (Malachite (Cu2CO3(OH)2)) — mineral

Malachite

Malachite (Cu2CO3(OH)2)

Swirled Agate Bead (Silicon Dioxide (SiO2)) — mineral

Swirled Agate Bead

Silicon Dioxide (SiO2)

Marble (Metamorphic Limestone (CaCO3)) — metamorphic

Marble

Metamorphic Limestone (CaCO3)

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

Chert (Flint Nodules)

Cryptocrystalline Quartz (SiO2)

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Natural Pearl (appearing in a jewelry setting) (Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin) — mineral

Natural Pearl (appearing in a jewelry setting)

Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin

Amethyst (Tumbled Cabinet Stone) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Tumbled Cabinet Stone)

Silicon Dioxide (SiO2) with iron impurities

Pink Granite (Intrusive Igneous Rock (high K-feldspar content)) — igneous

Pink Granite

Intrusive Igneous Rock (high K-feldspar content)

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Chert (Nodule) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

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

Granite

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

Blue Slag Glass (Amorphous Silica (Industrial byproduct)) — Antropogenic (Man-made glass byproduct)

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Antropogenic (Man-made glass byproduct)

Blue calcite sphere (Calcite (CaCO₃), commonly blue-calcite variety) — mineral

Blue calcite sphere

Calcite (CaCO₃), commonly blue-calcite variety

Pearl-and-gemstone insect brooch (Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image) — gemstone

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Sandstone (Pebble) (Arenite) — sedimentary

Sandstone (Pebble)

Arenite

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Smoky Quartz (Silicon Dioxide (SiO2) with trace aluminum and irradiation) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Chert (Microcrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline quartz (SiO2)

Petoskey Stone (Favosites alpenensis) — fossil

Petoskey Stone

Favosites alpenensis

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

Mahogany Obsidian

Volcanic glass (SiO2 with Hematite/Magnetite inclusions)

Sandstone (Sandstone (clastic sedimentary rock, predominantly SiO2)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock, predominantly SiO2)

Nephrite Jade (Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Granite (Phaneritic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)) — igneous

Granite

Phaneritic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)

Red gemstone ring, likely garnet or synthetic ruby (Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish) — gemstone

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Ferrosilicon Slag (Industrial Vitrified Glass) (Vitreous Silicate Residue) — Antropogenic (Man-made industrial byproduct)

Ferrosilicon Slag (Industrial Vitrified Glass)

Vitreous Silicate Residue

Antropogenic (Man-made industrial byproduct)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Dumortierite in Quartz (Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)) — mineral

Dumortierite in Quartz

Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)

Brown Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Brown Chert

Microcrystalline Quartz (SiO2)

Quartzite (Metamorphosed Quartz Sandstone) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone