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

Basalt (Basalt) — igneous

Basalt

Basalt

Coal (Coal (Sedimentary Rock / Organic Rock)) — sedimentary

Coal

Coal (Sedimentary Rock / Organic Rock)

Baroque cultured pearl necklace (Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin) — gemstone

Baroque cultured pearl necklace

Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin

Dalmatian stone (Dalmatian jasper (commercial name); commonly spotted rhyolite or related feldspar-rich rock, not true jasper) — igneous

Dalmatian stone

Dalmatian jasper (commercial name); commonly spotted rhyolite or related feldspar-rich rock, not true jasper

Quartz cabochon ring (stone identity uncertain) (Quartz, SiO₂ (possible smoky or included quartz)) — gemstone

Quartz cabochon ring (stone identity uncertain)

Quartz, SiO₂ (possible smoky or included quartz)

Granite Pebble (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite Pebble

Granite (Felsic Intrusive Igneous Rock)

Basalt (Basalt) — igneous

Basalt

Basalt

Bituminous Coal (Bituminous coal (Carbonaceous sedimentary rock)) — sedimentary

Bituminous Coal

Bituminous coal (Carbonaceous sedimentary rock)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Unidentified mineral specimen, possibly quartz-bearing rock (Undetermined from the photograph; no diagnostic mineral or rock name can be assigned reliably.) — mineral

Unidentified mineral specimen, possibly quartz-bearing rock

Undetermined from the photograph; no diagnostic mineral or rock name can be assigned reliably.

Rose Quartz (or Quartzite) (Silicon Dioxide (SiO2)) — mineral

Rose Quartz (or Quartzite)

Silicon Dioxide (SiO2)

Pebble (Lithic fragment / Water-worn rock) — sedimentary

Pebble

Lithic fragment / Water-worn rock

Fossiliferous Limestone (Calcite-rich Fossiliferous Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcite-rich Fossiliferous Limestone (CaCO3)

Rounded dark pebble, likely basalt or andesite (Fine-grained mafic to intermediate volcanic rock; commonly basalt (plagioclase, pyroxene, ± olivine)) — igneous

Rounded dark pebble, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; commonly basalt (plagioclase, pyroxene, ± olivine)

Laterite (Red Clay) (Laterite (Fe2O3 · nH2O and Al2O3 · nH2O)) — sedimentary

Laterite (Red Clay)

Laterite (Fe2O3 · nH2O and Al2O3 · nH2O)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Dyed Agate Slice (Silicon Dioxide (SiO2) with artificial colorants) — Mineral (variety of Chalcedony)

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial colorants

Mineral (variety of Chalcedony)

Quartz (Chalcedony / Rough Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chalcedony / Rough Quartz Pebble)

Silicon Dioxide (SiO2)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Clear quartz (rock crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Unidentified pink-and-gray mineral or rock specimen (Undetermined; the image is too blurry for reliable identification) — mineral

Unidentified pink-and-gray mineral or rock specimen

Undetermined; the image is too blurry for reliable identification

Garnet in Quartzite (Garnet-bearing Quartzite (SiO2 + X3Y2(SiO4)3)) — metamorphic

Garnet in Quartzite

Garnet-bearing Quartzite (SiO2 + X3Y2(SiO4)3)

Red garnet stud earrings (likely garnet) (Garnet group; most likely almandine, Fe₃Al₂(SiO₄)₃. The image alone cannot confirm the stone or whether it is natural.) — gemstone

Red garnet stud earrings (likely garnet)

Garnet group; most likely almandine, Fe₃Al₂(SiO₄)₃. The image alone cannot confirm the stone or whether it is natural.

Unidentified dark pebble (Undetermined; possibly polished basalt, chert, or iron-rich stone) — mineral

Unidentified dark pebble

Undetermined; possibly polished basalt, chert, or iron-rich stone

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

Quartzite

Quartzite (SiO2-rich metamorphic rock)

Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Quartzite (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite

SiO2 (Silicon Dioxide)

Basalt (River Pebble) (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt (River Pebble)

Basalt (Mafic Extrusive Igneous Rock)

Coal (Carbonaceous sedimentary rock (C)) — sedimentary

Coal

Carbonaceous sedimentary rock (C)

Phyllite (Phyllite (regional metamorphic rock)) — metamorphic

Phyllite

Phyllite (regional metamorphic rock)

Schist (Schist (Crystalline metamorphic rock)) — metamorphic

Schist

Schist (Crystalline metamorphic rock)

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

Basalt Pebble

Basalt (Mafic volcanic rock)

Granite (Pegmatitic) (Phaneritic Felsic Igneous Rock) — igneous

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Coal (Coal (Combustible sedimentary rock)) — sedimentary

Coal

Coal (Combustible sedimentary rock)

Garnet-bearing Schist / Conglomerate Specimen (Metamorphic rock with almandine garnet porphyroblasts) — metamorphic

Garnet-bearing Schist / Conglomerate Specimen

Metamorphic rock with almandine garnet porphyroblasts

Coal (Bituminous or Anthracite) (Organogenic Sedimentary Rock (Carbon)) — sedimentary

Coal (Bituminous or Anthracite)

Organogenic Sedimentary Rock (Carbon)

Quartzite with Quartz Veining (Metamorphosed Quartz-rich Sandstone (SiO2)) — metamorphic

Quartzite with Quartz Veining

Metamorphosed Quartz-rich Sandstone (SiO2)

Fossil brachiopod shell (Likely a spiriferid or orthid brachiopod; shell composed mainly of calcium carbonate (calcite)) — fossil

Fossil brachiopod shell

Likely a spiriferid or orthid brachiopod; shell composed mainly of calcium carbonate (calcite)

Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Pumice (Pumice (Vesicular Felsic Glass)) — igneous

Pumice

Pumice (Vesicular Felsic Glass)

Mixed collection of small rounded pebbles (Unidentified river- or beach-worn lithic clasts; individual rock types cannot be determined confidently from the image) — sedimentary

Mixed collection of small rounded pebbles

Unidentified river- or beach-worn lithic clasts; individual rock types cannot be determined confidently from the image