Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.

Learn about Sedimentary Or Metamorphic (Base Substrate) in the encyclopedia

Sard

White Obsidian

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Metabasalt

Eulysite

Breccia

Hornfels

Ironstone

Anthracite

Metaquartzite

Slate

Coquina (Bioclastic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Emerald (Beryl, Be₃Al₂(SiO₃)₆, colored green mainly by chromium and/or vanadium) — gemstone

Emerald

Beryl, Be₃Al₂(SiO₃)₆, colored green mainly by chromium and/or vanadium

Conglomerate (Asphaltic/Anthropogenic) (Clastic sedimentary rock / Bituminous mixture) — sedimentary

Conglomerate (Asphaltic/Anthropogenic)

Clastic sedimentary rock / Bituminous mixture

Labradorite (Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)) — Mineral

Labradorite

Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Garnet Gneiss (Gneiss containing Almandine Garnet) — metamorphic

Garnet Gneiss

Gneiss containing Almandine Garnet

Quartzite / Sandstone (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite / Sandstone

SiO2 (Silicon Dioxide)

Pale rounded quartz-rich pebble, likely quartzite (Quartzite (mostly microcrystalline SiO₂), possibly quartz-rich sandstone or vein quartz) — metamorphic

Pale rounded quartz-rich pebble, likely quartzite

Quartzite (mostly microcrystalline SiO₂), possibly quartz-rich sandstone or vein quartz

Quartz-rich rock, possibly milky quartz or quartzite fragment (Quartz (SiO₂), potentially quartzite if metamorphic) — mineral

Quartz-rich rock, possibly milky quartz or quartzite fragment

Quartz (SiO₂), potentially quartzite if metamorphic

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Gneiss (High-grade regional metamorphic rock (Foliated)) — metamorphic

Gneiss

High-grade regional metamorphic rock (Foliated)

Quartzite (Meta-sedimentary) (Quartzite (SiO2)) — metamorphic

Quartzite (Meta-sedimentary)

Quartzite (SiO2)

Plume Agate or Moss Agate (Agate (SiO2)) — mineral

Plume Agate or Moss Agate

Agate (SiO2)

Granite (Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)

Anthracite Coal (Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Gossan (Iron Hat) (Goethite-Hematite rich weathered rock (Fe-hydroxides)) — sedimentary

Gossan (Iron Hat)

Goethite-Hematite rich weathered rock (Fe-hydroxides)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)

Concrete (Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)) — sedimentary (artificial)

Concrete

Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)

sedimentary (artificial)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary (fossilized)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

sedimentary (fossilized)

Garnet Schist (Almandine-bearing Mica Schist) — metamorphic

Garnet Schist

Almandine-bearing Mica Schist

Greenstone / River Siltstone (Metasedimentary Greenstone (Chlorite-rich Siltstone)) — metamorphic

Greenstone / River Siltstone

Metasedimentary Greenstone (Chlorite-rich Siltstone)

Ferruginous Conglomerate (Ferruginous Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Soapstone (Steatite) (Steatite (Hydrous magnesium silicate)) — metamorphic

Soapstone (Steatite)

Steatite (Hydrous magnesium silicate)

Muscovite Schist (Metamorphic rock primarily composed of quartz and muscovite mica) — metamorphic

Muscovite Schist

Metamorphic rock primarily composed of quartz and muscovite mica

Gneiss and Igneous Rock Collection (Foliated Metamorphic Rock (Gneiss) / Igneous Rocks) — metamorphic

Gneiss and Igneous Rock Collection

Foliated Metamorphic Rock (Gneiss) / Igneous Rocks

Marble (Recrystallized Carbonate Rock (CaCO3)) — metamorphic

Marble

Recrystallized Carbonate Rock (CaCO3)

Zebra Jasper (Silicon Dioxide (SiO2)) — metamorphic

Zebra Jasper

Silicon Dioxide (SiO2)

Granite (with Muscovite Mica) (Phaneritic Felsic Igneous Rock (primarily Quartz SiO2, K-Feldspar KAlSi3O8, and Muscovite KAl2(AlSi3O10)(OH)2)) — igneous

Granite (with Muscovite Mica)

Phaneritic Felsic Igneous Rock (primarily Quartz SiO2, K-Feldspar KAlSi3O8, and Muscovite KAl2(AlSi3O10)(OH)2)

Slag — industrial by-product

Slag

industrial by-product

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

Chert (Nodule)

SiO2 (Microcrystalline Quartz)

Chert (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)