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

Garnet Schist (Almandine-Muscovite Schist) — metamorphic

Garnet Schist

Almandine-Muscovite Schist

Road-surface aggregate (crushed stone) (Unidentifiable mixed lithic aggregate; likely basaltic/andesitic fragments with feldspar, quartz, and weathered rock) — igneous

Road-surface aggregate (crushed stone)

Unidentifiable mixed lithic aggregate; likely basaltic/andesitic fragments with feldspar, quartz, and weathered rock

Pyrite-bearing rock (likely pyrite-rich quartz or schist) (Pyrite, FeS₂, intergrown with quartz and/or mica-rich matrix) — mineral

Pyrite-bearing rock (likely pyrite-rich quartz or schist)

Pyrite, FeS₂, intergrown with quartz and/or mica-rich matrix

Epidote (likely Unakite component or Epidosite) (Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

Quartz Vein in Matrix / Quartzite (Silicon Dioxide (SiO2) with host rock) — metamorphic

Quartz Vein in Matrix / Quartzite

Silicon Dioxide (SiO2) with host rock

Milky Quartz Vein in Mafic Rock (Quartzite vein in Metabasalt (SiO2 base)) — metamorphic

Milky Quartz Vein in Mafic Rock

Quartzite vein in Metabasalt (SiO2 base)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Pyrite in a host rock (Pyrite (FeS₂), embedded in a likely sedimentary or metamorphic matrix) — mineral

Pyrite in a host rock

Pyrite (FeS₂), embedded in a likely sedimentary or metamorphic matrix

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Pebble / Gravel (Clastic Sedimentary Specimen (likely Limestone or Quartzite base)) — sedimentary

Pebble / Gravel

Clastic Sedimentary Specimen (likely Limestone or Quartzite base)

Citrine (Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Greenstone (Metabasalt) — metamorphic

Greenstone

Metabasalt

Epidote (Epidote (Ca2(Al, Fe)3(SiO4)3(OH))) — mineral

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Gravel Pebble (Likely Quartzite or Basalt) (Quartzite (or Macrocrystalline Quartz)) — metamorphic

Gravel Pebble (Likely Quartzite or Basalt)

Quartzite (or Macrocrystalline Quartz)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Sandstone (Quartzose)

Arenite (SiO2 based)

Quartzite River Rock (Quartzite (SiO2 based metamorphic rock)) — metamorphic

Quartzite River Rock

Quartzite (SiO2 based metamorphic rock)

Anthracite Coal (Anthracite (Carbon-based metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based metamorphic rock)

Slate (Phyllo-silicate based metamorphic rock) — metamorphic

Slate

Phyllo-silicate based metamorphic rock

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Chert (Common Chert) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Common Chert)

Cryptocrystalline Quartz (SiO2)

Quartz / Limestone Gravel Pebble (Calcite (CaCO3) or Quartz (SiO2) aggregate) — sedimentary

Quartz / Limestone Gravel Pebble

Calcite (CaCO3) or Quartz (SiO2) aggregate

Gold (Native gold (Au)) — mineral

Gold

Native gold (Au)

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

Sandstone (Quartzose Sandstone)

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Amethyst crystal (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst crystal

Silicon Dioxide (SiO2) with iron impurities

Coquina (Bioclastic Sedimentary Rock) — sedimentary

Coquina

Bioclastic Sedimentary Rock

River Pebble (likely Quartzite or Siltstone) (Sedimentary Clast (SiO2 based)) — sedimentary

River Pebble (likely Quartzite or Siltstone)

Sedimentary Clast (SiO2 based)

Muscovite Mica (Muscovite / KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Sandstone (Sandstone ( преимущественно SiO2 )) — sedimentary

Sandstone

Sandstone ( преимущественно SiO2 )

Muscovite (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

KAl2(AlSi3O10)(OH)2

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

KAl2(AlSi3O10)(OH)2

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Sandstone (Quartzose)

Arenite (SiO2 based)

Biotite Mica (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Epidote (Greenstone) (Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote (Greenstone)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Sandstone Pebble (Arenite (SiO2 based)) — sedimentary

Sandstone Pebble

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)