Rock Identifier

Category

Industrial Byproduct (Anthropogenic Rock)

Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.

Learn about Industrial Byproduct (Anthropogenic Rock) in the encyclopedia

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Adirondack Garnet

Adirondack Garnet

Cataclasite

Anorthosite

Peridotite

Gondite

Phosphorite

Schist (Crystalline Metamorphic Rock (Schistose)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schistose)

Vesicular Basalt (Basalt (Mafic volcanic rock)) — igneous

Vesicular Basalt

Basalt (Mafic volcanic rock)

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

Quartz (Druzy) on Matrix

Silicon Dioxide (SiO2)

Quartz Vein Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein Rock

Silicon Dioxide (SiO2)

Small brown rock fragment; exact identification uncertain (Unidentified fine-grained lithic fragment) — igneous

Small brown rock fragment; exact identification uncertain

Unidentified fine-grained lithic fragment

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Weathered, iron-stained rock fragment (Unidentified silicate-rich rock; the image is insufficient for a reliable species identification) — igneous

Weathered, iron-stained rock fragment

Unidentified silicate-rich rock; the image is insufficient for a reliable species identification

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Quartzite Cobble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Cobble

Quartzite (mostly SiO2)

Quartzite (Quartzite) — metamorphic

Quartzite

Quartzite

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Serpentinite (Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz vein in mica-rich host rock (Milky quartz (SiO₂) in a mica-rich metamorphic matrix, likely schist) — metamorphic

Quartz vein in mica-rich host rock

Milky quartz (SiO₂) in a mica-rich metamorphic matrix, likely schist

Porphyritic volcanic pebble, likely andesite (Porphyritic andesite (tentative; exact identification requires testing)) — igneous

Porphyritic volcanic pebble, likely andesite

Porphyritic andesite (tentative; exact identification requires testing)

Basalt (Extrusive Igneous Basalt) — igneous

Basalt

Extrusive Igneous Basalt

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

Vesicular Basalt (Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Vesicular Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

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

Chert Nodule (Flint)

Microcrystalline Quartz (SiO2)

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)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Small, rounded stone pebble (Unidentified natural pebble; the image does not show enough detail to identify its mineral or rock type) — sedimentary

Small, rounded stone pebble

Unidentified natural pebble; the image does not show enough detail to identify its mineral or rock type

Weathered copper-bearing rock (likely malachite-stained basalt or greenstone) (Malachite, Cu₂CO₃(OH)₂, as a secondary coating on a mafic host rock; exact identification requires testing) — igneous

Weathered copper-bearing rock (likely malachite-stained basalt or greenstone)

Malachite, Cu₂CO₃(OH)₂, as a secondary coating on a mafic host rock; exact identification requires testing

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Painted/tumbled stone specimens (Unidentified natural rock; likely a dark silicate stone and a weathered brown stone) — mineral

Painted/tumbled stone specimens

Unidentified natural rock; likely a dark silicate stone and a weathered brown stone

Sandstone (Pebble) (Sandstone (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Pebble)

Sandstone (SiO2 with iron oxide impurities)

Granitic Pegmatite (with Smoky Quartz and Mica) (Granitic Pegmatite (composed of SiO2, KAl2(AlSi3O10)(OH)2, and (K,Na)(AlSi3O8))) — igneous

Granitic Pegmatite (with Smoky Quartz and Mica)

Granitic Pegmatite (composed of SiO2, KAl2(AlSi3O10)(OH)2, and (K,Na)(AlSi3O8))

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Red Claystone / Mudstone (Argillaceous sedimentary rock) — sedimentary

Red Claystone / Mudstone

Argillaceous sedimentary rock

Gold-bearing Quartz / Auriferous River Rock (Lode Gold in Quartz Matrix (SiO2 + Au)) — sedimentary

Gold-bearing Quartz / Auriferous River Rock

Lode Gold in Quartz Matrix (SiO2 + Au)

Sandstone (Iron-stained) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (primarily SiO2 with Fe2O3 staining)

Basalt Scoria (Aphanitic basaltic scoria) — igneous

Basalt Scoria

Aphanitic basaltic scoria

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Carborundum (Silicon Carbide) (Silicon Carbide (SiC) / Moissanite (natural form)) — mineral

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Tiny rounded brown mineral grain (Indeterminate; possibly iron oxide, garnet, or a weathered sulfide grain) — mineral

Tiny rounded brown mineral grain

Indeterminate; possibly iron oxide, garnet, or a weathered sulfide grain

Probable fossil-bearing rock or mineral concretion (Unidentified carbonate-rich concretion with a possible fossil inclusion) — fossil

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

Quartz Vein in Metamorphic Rock (SiO2) — metamorphic

Quartz Vein in Metamorphic Rock

SiO2