Rock Identifier

Category

Industrial Byproduct (Anthropogenic Rock)

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

Ferruginous Quartz (Quartz (Silicon Dioxide, SiO2) with Iron Oxides) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with Iron Oxides

Garnet (likely Almandine or Pyrope) (Garnet Group, Nesosilicates (Complex chemistry, e.g., Almandine: Fe3Al2Si3O12)) — mineral

Garnet (likely Almandine or Pyrope)

Garnet Group, Nesosilicates (Complex chemistry, e.g., Almandine: Fe3Al2Si3O12)

Chert (specifically Gray/Banded Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Gray/Banded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

White Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Tumbled)

Silicon Dioxide (SiO2)

Ruby (Corundum (Al2O3 with Chromium)) — mineral

Ruby

Corundum (Al2O3 with Chromium)

Quartz (Chert/Chalcedony Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony Variety)

Silicon Dioxide (SiO2)

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — Mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Chert (Jasper/Common Opal transition) (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Chert (Jasper/Common Opal transition)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Copper Ore (likely Chalcopyrite in Matrix) (Chalcopyrite (CuFeS2)) — mineral

Copper Ore (likely Chalcopyrite in Matrix)

Chalcopyrite (CuFeS2)

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Ruby (Corundum) (Aluminum oxide (Al2O3) with Chromium traces) — mineral

Ruby (Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Mica Schist (Mica Schist (Quartz-Biotite-Muscovite Schist)) — metamorphic

Mica Schist

Mica Schist (Quartz-Biotite-Muscovite Schist)

Anthracite (Anthracite (Carbon)) — metamorphic

Anthracite

Anthracite (Carbon)

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Chert (Green variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green variety)

Silicon Dioxide (SiO2)

Rough Green Sapphire (Corundum) (Corundum (Al2O3 - Aluminum Oxide with trace elements)) — mineral

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Specular Hematite (Hematite (Iron Oxide, Fe2O3)) — mineral

Specular Hematite

Hematite (Iron Oxide, Fe2O3)

Red Garnet (Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)) — mineral

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Pegmatite (Granitic) (Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)) — igneous

Pegmatite (Granitic)

Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Chalcedony (Commonly known as Carnelian or Agate pebble) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (Commonly known as Carnelian or Agate pebble)

Microcrystalline Quartz (SiO2)

Green Calcite (Calcite (CaCO3)) — mineral

Green Calcite

Calcite (CaCO3)

Blue Sapphire (Corundum (Al2O3 with trace amounts of iron and titanium)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

Orange Calcite (Dogtooth/Cluster) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Dogtooth/Cluster)

Calcium Carbonate (CaCO3)

Diamond (Diamond (Pure Carbon, C)) — Mineral

Diamond

Diamond (Pure Carbon, C)

Quartzite (River Cobble) (Quartzite (Metamorphosed Quartz Sandstone, SiO2)) — metamorphic

Quartzite (River Cobble)

Quartzite (Metamorphosed Quartz Sandstone, SiO2)

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Almandine Garnet (Almandite (Fe3Al2(SiO4)3)) — Mineral

Almandine Garnet

Almandite (Fe3Al2(SiO4)3)

Amethyst Quartz (SiO2 (Silicon Dioxide)) — Mineral

Amethyst Quartz

SiO2 (Silicon Dioxide)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — Mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Granitic Pegmatite (Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase) — igneous

Granitic Pegmatite

Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase

Marble (Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)) — metamorphic

Marble

Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)

Oyster Shell (Aragonite/Calcite) (Calcium Carbonate (CaCO3)) — sedimentary

Oyster Shell (Aragonite/Calcite)

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Orange Quartz (Citrine Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Orange Quartz (Citrine Quartz variety)

Silicon Dioxide (SiO2)

Quartzite (Metamorphosed Sandstone (SiO2 - Silicon Dioxide)) — metamorphic

Quartzite

Metamorphosed Sandstone (SiO2 - Silicon Dioxide)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Quartzite Pebbles (Quartzite (SiO2)) — metamorphic

Quartzite Pebbles

Quartzite (SiO2)