Rock Identifier

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Industrial Byproduct

Browse industrial byproduct specimens identified by the Rock Identifier community.

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Adirondack Garnet

Adirondack Garnet

Almandine Garnet

Almandine Garnet

Tripolite

Diatomaceous Earth

Anthracite coal (likely) (Anthracite; carbon-rich coal composed mainly of maceral vitrinite, with variable mineral impurities) — sedimentary

Anthracite coal (likely)

Anthracite; carbon-rich coal composed mainly of maceral vitrinite, with variable mineral impurities

sedimentary
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

mineral
Mica in Quartz Host (Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)) — igneous

Mica in Quartz Host

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

igneous
Ironstone with Limonite/Goethite coating (Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)) — sedimentary

Ironstone with Limonite/Goethite coating

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)

sedimentary
Quartzite (Milky) (Quartzite (SiO2)) — metamorphic

Quartzite (Milky)

Quartzite (SiO2)

metamorphic
Diamond (C (Carbon)) — gemstone

Diamond

C (Carbon)

gemstone
Polished black stone, likely basalt or fine-grained mafic rock (Basalt (probable; identification uncertain from photograph)) — igneous

Polished black stone, likely basalt or fine-grained mafic rock

Basalt (probable; identification uncertain from photograph)

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

Chert Nodule (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Iron Meteorite (Oxidized) (Iron-Nickel Alloy (Fe, Ni)) — meteorite

Iron Meteorite (Oxidized)

Iron-Nickel Alloy (Fe, Ni)

meteorite
Bog Iron (Limonite Concretion) (Limonite (FeO(OH)·nH2O)) — sedimentary

Bog Iron (Limonite Concretion)

Limonite (FeO(OH)·nH2O)

sedimentary
Oolitic Ironstone (Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)) — sedimentary

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

sedimentary
Bituminous Coal (Coal (Sedimentary Rock)) — sedimentary

Bituminous Coal

Coal (Sedimentary Rock)

sedimentary
Wollastonite (Calcium Inosilicate, CaSiO3) — mineral

Wollastonite

Calcium Inosilicate, CaSiO3

mineral
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate) (Mixed Silicates and Oxides (predominantly SiO2 group minerals)) — mineral

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

mineral
Talc (Soapstone variety) (Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2) — mineral

Talc (Soapstone variety)

Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2

mineral
Black obsidian (possibly industrial glass or slag) (Volcanic glass; predominantly rhyolitic composition, chiefly SiO₂) — igneous

Black obsidian (possibly industrial glass or slag)

Volcanic glass; predominantly rhyolitic composition, chiefly SiO₂

igneous
Likely weathered basaltic rock or slag-like volcanic specimen (Fine-grained mafic rock, probably basalt; exact identification requires testing) — igneous

Likely weathered basaltic rock or slag-like volcanic specimen

Fine-grained mafic rock, probably basalt; exact identification requires testing

igneous
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Granite (Phaneritic Plutonic Igneous Rock) — igneous

Granite

Phaneritic Plutonic Igneous Rock

igneous
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Basalt (Basalt (extrusive igneous rock)) — igneous

Basalt

Basalt (extrusive igneous rock)

igneous
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Basalt (Aphanitic Mafic Volcanic Rock (Fe/Mg rich)) — igneous

Basalt

Aphanitic Mafic Volcanic Rock (Fe/Mg rich)

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

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

sedimentary
Quartzite (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite

SiO2 (Silicon Dioxide)

metamorphic
Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

igneous
Basalt (Mafic Igneous Rock (Basalt)) — igneous

Basalt

Mafic Igneous Rock (Basalt)

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

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

sedimentary
Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

igneous
Basalt (Extrusive Igneous Basalt) — igneous

Basalt

Extrusive Igneous Basalt

igneous
Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

sedimentary
Pumice (Pumice (SiO2)) — igneous

Pumice

Pumice (SiO2)

igneous
Greywacke (Lithic Sandstone (Greywacke)) — sedimentary

Greywacke

Lithic Sandstone (Greywacke)

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Basalt Scoria (Aphanitic basaltic scoria) — igneous

Basalt Scoria

Aphanitic basaltic scoria

igneous
Greywacke (Sandstone) (Lithic wacke) — sedimentary

Greywacke (Sandstone)

Lithic wacke

sedimentary
Diamond (Uncut/Rough) (Carbon (C)) — mineral

Diamond (Uncut/Rough)

Carbon (C)

mineral
Pumice (Pumice (Vesicular Volcanic Glass)) — igneous

Pumice

Pumice (Vesicular Volcanic Glass)

igneous
Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

igneous
Coal (Anthracite) (Anthracite coal (Carbon C)) — sedimentary

Coal (Anthracite)

Anthracite coal (Carbon C)

sedimentary
Quartzite (Quartzite (SiO2-rich metamorphic rock)) — metamorphic

Quartzite

Quartzite (SiO2-rich metamorphic rock)

metamorphic