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

Asphalt Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Adirondack Garnet

Adirondack Garnet

Anorthosite

Cataclasite

Peridotite

Phosphorite

Gondite

Graphite-veined Quartzite (Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)) — metamorphic

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Iron-rich quartzite or ironstone fragment (Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite) — metamorphic

Iron-rich quartzite or ironstone fragment

Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite

Blue Sapphire (Corundum (Al2O3 - Aluminum Oxide)) — mineral

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Red Sandstone (Arenite (Iron-rich Sandstone)) — sedimentary

Red Sandstone

Arenite (Iron-rich Sandstone)

Agate (specifically a Thunderegg/Agate Nodule) (Cryptocrystalline Quartz (SiO2)) — mineral

Agate (specifically a Thunderegg/Agate Nodule)

Cryptocrystalline Quartz (SiO2)

Gneiss (specifically Micaceous Gneiss) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Bowling Ball (Brunswick T-Zone Deep Space) (Polyester resin / Polyurethane polymer) — Synthetic (not a natural rock)

Bowling Ball (Brunswick T-Zone Deep Space)

Polyester resin / Polyurethane polymer

Synthetic (not a natural rock)

Rounded river pebble (Indeterminate; likely quartz-rich sandstone, chert, or weathered volcanic rock) — sedimentary

Rounded river pebble

Indeterminate; likely quartz-rich sandstone, chert, or weathered volcanic rock

Garnet Schist (Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)) — metamorphic

Garnet Schist

Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)

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

Pumice

Pumice (a highly vesicular volcanic rock)

Sapphire (Corundum (Al2O3) with traces of Iron and Titanium) — gemstone

Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Vesicular Basalt with Oxidation (Scoriaceous Olivine Basalt (Mafic volcanic rock)) — igneous

Vesicular Basalt with Oxidation

Scoriaceous Olivine Basalt (Mafic volcanic rock)

Chert / Chalcedony Nodules (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Chalcedony Nodules

Microcrystalline Quartz (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite-bearing schist (likely mica schist) (Muscovite–quartz schist with disseminated pyrite (FeS₂)) — metamorphic

Pyrite-bearing schist (likely mica schist)

Muscovite–quartz schist with disseminated pyrite (FeS₂)

White Topaz (Topaz [Al2SiO4(F,OH)2]) — mineral

White Topaz

Topaz [Al2SiO4(F,OH)2]

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Granitic Gravel Piece (Granite (Felsic Plutonic Rock / SiO2 with Al2O3, K2O, Na2O)) — igneous

Granitic Gravel Piece

Granite (Felsic Plutonic Rock / SiO2 with Al2O3, K2O, Na2O)

Dalmatian jasper (Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions) — igneous

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Obsidian (likely snowflake-free black volcanic glass) (Volcanic glass; predominantly rhyolitic silica melt (SiO₂-rich, noncrystalline)) — igneous

Obsidian (likely snowflake-free black volcanic glass)

Volcanic glass; predominantly rhyolitic silica melt (SiO₂-rich, noncrystalline)

Garnet in Schist/Gneiss Matrix (Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)) — metamorphic

Garnet in Schist/Gneiss Matrix

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Basalt (Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — Igneous

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Chalcedony (Common Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Common Agate)

Cryptocrystalline Quartz (SiO2)

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Polished ocean jasper / brecciated jasper (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and other silicate inclusions) — mineral

Polished ocean jasper / brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and other silicate inclusions

Garnet amphibolite / Metamorphic Rock (Garnet Amphibolite (Hornblende - Almandine schist/gneiss)) — metamorphic

Garnet amphibolite / Metamorphic Rock

Garnet Amphibolite (Hornblende - Almandine schist/gneiss)

Iron meteorite fragment (Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment) — meteorite

Iron meteorite fragment

Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment

Anthracite Coal (Anthracite (Carbon-based organic sedimentary/metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Rounded reddish-brown pebble (Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests) — sedimentary

Rounded reddish-brown pebble

Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests

Quartz Geode (likely within Limestone or Dolomite matrix) (Quartz (SiO₂)) — Mineral within a Sedimentary Rock

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Mineral within a Sedimentary Rock

Blue Sapphire (Tumbled/Polished) (Corundum (Al2O3)) — mineral

Blue Sapphire (Tumbled/Polished)

Corundum (Al2O3)

Uncertain small metallic-looking mineral/rock fragment (Indeterminate; possibly galena-bearing rock or metallic slag) — mineral

Uncertain small metallic-looking mineral/rock fragment

Indeterminate; possibly galena-bearing rock or metallic slag

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Iron-stained Quartz (Gossan/Limonite-coated Quartz) (Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)) — mineral

Iron-stained Quartz (Gossan/Limonite-coated Quartz)

Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)

Coal (Anthracite / Bituminous) (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Quartz-rich rock with chlorite/epidote vein (Milky quartz with green chlorite or epidote; exact identification requires testing) — metamorphic

Quartz-rich rock with chlorite/epidote vein

Milky quartz with green chlorite or epidote; exact identification requires testing

Iron-Stained Quartz (Riverside Cobble) (Silicon Dioxide (SiO2) with Limonite/Hematite inclusions) — mineral

Iron-Stained Quartz (Riverside Cobble)

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions