Rock Identifier

Category

Industrial Byproduct (Anthropogenic Material)

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

Learn about Industrial Byproduct (Anthropogenic Material) in the encyclopedia

Adirondack Garnet

Adirondack Garnet

Peat

Almandine Garnet

Almandine Garnet

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Orange Obsidian

Diamond

Metarhyolite

Desert Rose (Gypsum Variety) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Granite Pegmatite (Coarse-grained Granite (SiO2 - Aluminum and Alkalies)) — igneous

Granite Pegmatite

Coarse-grained Granite (SiO2 - Aluminum and Alkalies)

Garnet (Garnet group (X3Y2(SiO4)3)) — mineral

Garnet

Garnet group (X3Y2(SiO4)3)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Polished tiger’s-eye cabochon (probable) (Quartz variety, SiO₂, with fibrous riebeckite/crocidolite-derived inclusions) — metamorphic

Polished tiger’s-eye cabochon (probable)

Quartz variety, SiO₂, with fibrous riebeckite/crocidolite-derived inclusions

Schist (Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])) — metamorphic

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Quartzite (Quartz-rich metamorphic rock; chiefly SiO₂) — metamorphic

Quartzite

Quartz-rich metamorphic rock; chiefly SiO₂

Biotite schist (likely graphite-bearing) (Mica schist; chiefly quartz + biotite mica, with possible graphite and feldspar) — metamorphic

Biotite schist (likely graphite-bearing)

Mica schist; chiefly quartz + biotite mica, with possible graphite and feldspar

Limestone (Sedimentary rock composed mainly of calcium carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed mainly of calcium carbonate (CaCO3)

Coquina / Limonite-stained Limestone (Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)) — sedimentary

Coquina / Limonite-stained Limestone

Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Petrified Wood (Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement of cellulose)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of cellulose)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

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

Coal (Bituminous Coal)

Caustobiolith / Sedimentary Rock

Quartz Matrix with Iron Staining / Mica Schist (Silicon Dioxide (SiO2) with Iron Oxide staining) — mineral

Quartz Matrix with Iron Staining / Mica Schist

Silicon Dioxide (SiO2) with Iron Oxide staining

Corundum (Sapphire in Matrix) (Aluminum Oxide (Al2O3)) — mineral

Corundum (Sapphire in Matrix)

Aluminum Oxide (Al2O3)

Quartz (Agate/Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz (Agate/Chalcedony)

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (Chalcedony), SiO2

Ruby (Raw Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Quartz (Milky or Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Iron-stained)

Silicon Dioxide (SiO2)

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Native Copper with Malachite/Oxide Coating (Native Copper (Cu)) — mineral

Native Copper with Malachite/Oxide Coating

Native Copper (Cu)

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

Quartz Vein Rock

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Limestone Cobble (Carbonate Rock (CaCO3)) — sedimentary

Limestone Cobble

Carbonate Rock (CaCO3)

Sandstone Pebble (Arenite (SiO2 based)) — sedimentary

Sandstone Pebble

Arenite (SiO2 based)

Sandstone with Iron Staining (Arenite (SiO2 with Fe-oxide impurities)) — sedimentary

Sandstone with Iron Staining

Arenite (SiO2 with Fe-oxide impurities)

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.) (Mixed Silicates and Sulfides (SiO2, FeS2)) — mineral

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Vuggy Quartz / Chert (Silicon Dioxide (SiO2)) — sedimentary

Vuggy Quartz / Chert

Silicon Dioxide (SiO2)

Garnet (Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)) — mineral

Garnet

Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)

Garnet (Garnet Group (Silicate Minerals)) — mineral

Garnet

Garnet Group (Silicate Minerals)

Garnetiferous Quartzite (Garnet Gneiss Pebble) (Garnet-bearing Quartzite or Quartz-Feldspar Gneiss) — metamorphic

Garnetiferous Quartzite (Garnet Gneiss Pebble)

Garnet-bearing Quartzite or Quartz-Feldspar Gneiss

Quartzite Pebble (Quartzite (Silicon Dioxide: SiO2)) — metamorphic

Quartzite Pebble

Quartzite (Silicon Dioxide: SiO2)

Quartzite Cobble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Cobble

Quartzite (mostly SiO2)

Rough Quartz (var. Citrine or Yellow Quartz) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (var. Citrine or Yellow Quartz)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Carcharodon (Galeocerdo sp. or Lamniform)) — mineral

Fossilized Shark Tooth

Carcharodon (Galeocerdo sp. or Lamniform)

Quartz-encrusted Matrix (Silicon Dioxide (SiO2) with Ferruginous Sandstone) — sedimentary

Quartz-encrusted Matrix

Silicon Dioxide (SiO2) with Ferruginous Sandstone

Granite (Granite) — Igneous

Granite

Granite

Likely weathered quartz-rich stone or fossil fragment (Indeterminate; possibly quartz-bearing sandstone, iron-stained quartz, or a fragmentary fossil) — mineral

Likely weathered quartz-rich stone or fossil fragment

Indeterminate; possibly quartz-bearing sandstone, iron-stained quartz, or a fragmentary fossil

Diamond (Diamond (Carbon, C)) — mineral

Diamond

Diamond (Carbon, C)