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

Mica (Biotite or Phlogopite Buchsam) (Silicate Mineral (Phyllosilicate family)) — mineral

Mica (Biotite or Phlogopite Buchsam)

Silicate Mineral (Phyllosilicate family)

Sandstone Pebble (Arenite (SiO2 with minor mineral cements)) — sedimentary

Sandstone Pebble

Arenite (SiO2 with minor mineral cements)

Sandstone (lithic) (Lithic Wacke / Arenite) — sedimentary

Sandstone (lithic)

Lithic Wacke / Arenite

Shale (with Iron Oxide staining) (Fissile Mudstone (primarily Quartz and Clay minerals)) — sedimentary

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Mica Schist (Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

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

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Bloodstone (Chalcedony quartz variety (SiO2) with inclusions) — mineral

Bloodstone

Chalcedony quartz variety (SiO2) with inclusions

Pyrite in Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix

Iron Sulfide (FeS2)

Quartz (likely Rose Quartz or Milky Quartz based on color) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Muscovite (Mica) in Quartz Matrix (Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)) — mineral

Muscovite (Mica) in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)

Mica (Muscovite) (Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2) — mineral

Mica (Muscovite)

Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2

Pyrite in Matrix (Iron Disulfide (FeS2)) — mineral

Pyrite in Matrix

Iron Disulfide (FeS2)

Schist (Graphite or Mica rich) (Crystalline Schist (often containing Muscovite, Biotite, or Graphite)) — metamorphic

Schist (Graphite or Mica rich)

Crystalline Schist (often containing Muscovite, Biotite, or Graphite)

Mica Schist (Mica Schist) — metamorphic

Mica Schist

Mica Schist

Banded gneiss pebble (Gneiss, typically quartz–feldspar–mica assemblage) — metamorphic

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica assemblage

Breccia (Breccia) — sedimentary

Breccia

Breccia

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Magnetite (Small Granule) (Magnetite (Fe3O4)) — mineral

Magnetite (Small Granule)

Magnetite (Fe3O4)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Stichtite in Serpentine (Atlantisite) (Mg6Cr2CO3(OH)16·4H2O (Stichtite) / Mg3Si2O5(OH)4 (Serpentine)) — metamorphic

Stichtite in Serpentine (Atlantisite)

Mg6Cr2CO3(OH)16·4H2O (Stichtite) / Mg3Si2O5(OH)4 (Serpentine)

Schist (Garnet-Mica Schist) (Garnet-Mica Schist (X-Y)3Z2(SiO4)3) — metamorphic

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Serpentine (Serpentinite) (Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine (Serpentinite)

Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4

Fossiliferous Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Sedimentary Calcium Carbonate (CaCO3)

Limestone (Sedimentary rock composed of Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Sandstone (with Iron Staining) (Arenite) — sedimentary

Sandstone (with Iron Staining)

Arenite

Breccia (Breccia) — sedimentary

Breccia

Breccia

Mica Schist (Mica Schist (contains Muscovite/Biotite, Quartz)) — metamorphic

Mica Schist

Mica Schist (contains Muscovite/Biotite, Quartz)

Hag Stone (Perforated Sedimentary Rock (typically Limestone or Sandstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Bivalve Fossil (Bivalvia (Phylum Mollusca)) — Fossil

Bivalve Fossil

Bivalvia (Phylum Mollusca)

Jasper / Quartz Pebble (Silicon Dioxide (SiO2) with microcrystalline impurities) — sedimentary

Jasper / Quartz Pebble

Silicon Dioxide (SiO2) with microcrystalline impurities

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Blue Apatite (Apatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Green Aventurine (SiO2) — mineral

Green Aventurine

SiO2

Pyrite in Matrix (Iron Sulfide (FeS2) embedded in host rock) — mineral

Pyrite in Matrix

Iron Sulfide (FeS2) embedded in host rock

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Orange Quartzite (River Pebble) (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Orange Quartzite (River Pebble)

Quartzite (SiO2 with iron oxide impurities)

Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)