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

African Turquoise (Jasper) (Impure variety of silica, primarily Quartz (SiO2) with various inclusions) — sedimentary

African Turquoise (Jasper)

Impure variety of silica, primarily Quartz (SiO2) with various inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Sandstone (Weathered)

Arenite (primarily SiO2)

Crinoid Stem Fragment (Crinoid (Phylum Echinodermata, Class Crinoidea)) — sedimentary

Crinoid Stem Fragment

Crinoid (Phylum Echinodermata, Class Crinoidea)

Calamites Fossil (Horsetail Stem) (Calamites (Genus), part of the class Equisetopsida) — sedimentary

Calamites Fossil (Horsetail Stem)

Calamites (Genus), part of the class Equisetopsida

Native Gold (Native Gold (Au)) — mineral

Native Gold

Native Gold (Au)

Tumbled Carnelian and Quartz Mix (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — Sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Ventifact (Wind-abraded rock (Ventifact)) — sedimentary

Ventifact

Wind-abraded rock (Ventifact)

Pyrite (Iron Pyrite (FeS₂)) — Mineral

Pyrite

Iron Pyrite (FeS₂)

Banded Slate (Slate (Metamorphosed Siltstone/Mudstone)) — metamorphic

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (specifically Double Arch in Arches National Park) (Entrada Sandstone) — sedimentary

Sandstone (specifically Double Arch in Arches National Park)

Entrada Sandstone

Sandstone (with banding/weathering) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (with banding/weathering)

Clastic Sedimentary Rock (primarily SiO2)

Fossilized Coral (Petoskey Stone or similar Favosites) (Hexagonaria percarinata / Favosites (Silurian-Devonian Coral)) — sedimentary

Fossilized Coral (Petoskey Stone or similar Favosites)

Hexagonaria percarinata / Favosites (Silurian-Devonian Coral)

Conglomerate (Pebble Conglomerate / Clastic Sedimentary Rock) — sedimentary

Conglomerate

Pebble Conglomerate / Clastic Sedimentary Rock

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions

Dendritic Jasper (Bumblebee like Agate) (Silicon Dioxide with inclusions (SiO2)) — sedimentary

Dendritic Jasper (Bumblebee like Agate)

Silicon Dioxide with inclusions (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Green Moss Agate (Silicon Dioxide with inclusions (SiO2)) — sedimentary

Green Moss Agate

Silicon Dioxide with inclusions (SiO2)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Slate (Slate (Metamorphic rock)) — metamorphic

Slate

Slate (Metamorphic rock)

River Pebble (Quartzite) (Quartzite (SiO2)) — metamorphic

River Pebble (Quartzite)

Quartzite (SiO2)

Bloodstone (Heliotrope (Cryptocrystalline Quartz, SiO2)) — mineral

Bloodstone

Heliotrope (Cryptocrystalline Quartz, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Sandstone Pebble with Mineral Encrustation (Quartz Sandstone with Calcite/Halite Crust) — sedimentary

Sandstone Pebble with Mineral Encrustation

Quartz Sandstone with Calcite/Halite Crust

Jasper with Cinnabar (Dragon Blood Jasper variant) (Silicon Dioxide with Mercury Sulfide (SiO2 + HgS)) — sedimentary

Jasper with Cinnabar (Dragon Blood Jasper variant)

Silicon Dioxide with Mercury Sulfide (SiO2 + HgS)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartz (Clear/Milky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear/Milky)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (River Pebble) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (River Pebble)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (and Quartz Gravel) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (and Quartz Gravel)

Chert (Cryptocrystalline Quartz, SiO2)

Coquina / Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate - CaCO3)

Coquina with Shell Fragment (Bioclastic Limestone (composed primarily of CaCO3)) — sedimentary

Coquina with Shell Fragment

Bioclastic Limestone (composed primarily of CaCO3)