Rock Identifier

Category

Sedimentary Or Metamorphic (Low Grade)

Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.

Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia

Greenschist

Slate

Lignite

Calcilutite

Calcirudite

Grape Garnet

Grape Agate

Granulite

Chlorite Schist

Chlorite Schist

Turbidite

Conglomerate

Greenstone

Whetstone (Novaculite / Microcrystalline Quartz) — metamorphic

Whetstone

Novaculite / Microcrystalline Quartz

Greenstone (Metabasalt / Chlorite-actinolite schist) — metamorphic

Greenstone

Metabasalt / Chlorite-actinolite schist

Greenstone (Metabasalt) — metamorphic

Greenstone

Metabasalt

Greenstone / Serpentinite Pebble (Serpentinite / Greenschist facies rock) — metamorphic

Greenstone / Serpentinite Pebble

Serpentinite / Greenschist facies rock

Greenstone with Pyrite inclusions (Greenschist / Meta-volcanic rock with Iron Disulfide (FeS2)) — metamorphic

Greenstone with Pyrite inclusions

Greenschist / Meta-volcanic rock with Iron Disulfide (FeS2)

Slate (Slate; fine-grained metamorphosed shale, commonly quartz–illite/chlorite rich) — metamorphic

Slate

Slate; fine-grained metamorphosed shale, commonly quartz–illite/chlorite rich

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Epidote (Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Banded Slate or Siltstone with Quartz/Calcite Veins (Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)) — metamorphic

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Jadeite Jade (Jadeite (NaAlSi2O6)) — metamorphic

Jadeite Jade

Jadeite (NaAlSi2O6)

Gray Slate River Stone (Slate) — metamorphic

Gray Slate River Stone

Slate

Slate (Slate; fine-grained metamorphosed shale, commonly composed of quartz, illite/muscovite, and chlorite) — metamorphic

Slate

Slate; fine-grained metamorphosed shale, commonly composed of quartz, illite/muscovite, and chlorite

Ferruginous Sandstone (Clastic Sedimentary Rock (Iron-rich)) — sedimentary

Ferruginous Sandstone

Clastic Sedimentary Rock (Iron-rich)

Greenstone / Glauconitic Siltstone (Metabasalt or Glauconite-rich Sedimentary Rock) — metamorphic or sedimentary

Greenstone / Glauconitic Siltstone

Metabasalt or Glauconite-rich Sedimentary Rock

metamorphic or sedimentary

Anthracite Coal (Low-grade metamorphic carbonaceous rock) — metamorphic

Anthracite Coal

Low-grade metamorphic carbonaceous rock

Green Schist (Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Greenstone (Epidiorite / Altered Basalt) — metamorphic

Greenstone

Epidiorite / Altered Basalt

Greenstone (Metabasalt (Greenstone)) — metamorphic

Greenstone

Metabasalt (Greenstone)

Greenschist (Greenschist (Chlorite Schist facies)) — metamorphic

Greenschist

Greenschist (Chlorite Schist facies)

Greenstone (Metabalt) (Chlorite schist / Altered Basalt) — metamorphic

Greenstone (Metabalt)

Chlorite schist / Altered Basalt

Slate (Slate) — metamorphic

Slate

Slate

Nephrite Jade / Greenstone (Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]) — metamorphic

Nephrite Jade / Greenstone

Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]

Greenschist / Greenstone (Greenschist (composed of chlorite, epidote, actinolite, albite)) — metamorphic

Greenschist / Greenstone

Greenschist (composed of chlorite, epidote, actinolite, albite)

Slate (Foliated Metamorphic Rock (primarily clay minerals and micas)) — metamorphic

Slate

Foliated Metamorphic Rock (primarily clay minerals and micas)

Slate River Stone (Foliated Metamorphic Rock (composed of illite, chlorite, and quartz)) — metamorphic

Slate River Stone

Foliated Metamorphic Rock (composed of illite, chlorite, and quartz)

Greenstone (Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)) — metamorphic

Greenstone

Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)

Greenschist (Chlorite-actinolite schist) — metamorphic

Greenschist

Chlorite-actinolite schist

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

Banded gneiss

Gneiss; typically quartz–feldspar–mica assemblage

Actinolite (Ca2(Mg,Fe)5Si8O22(OH)2) — mineral

Actinolite

Ca2(Mg,Fe)5Si8O22(OH)2

Weathered quartz-rich pebble, likely sandstone or quartzite (Quartzite (SiO₂), possibly ferruginous sandstone) — metamorphic

Weathered quartz-rich pebble, likely sandstone or quartzite

Quartzite (SiO₂), possibly ferruginous sandstone

Argillite (with Barnacles) (Argillite (metamorphosed mudstone/shale)) — metamorphic

Argillite (with Barnacles)

Argillite (metamorphosed mudstone/shale)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz-rich pegmatitic rock, probably granitic gneiss (Quartz–feldspar–mica gneiss; locally pegmatitic granite) — metamorphic

Quartz-rich pegmatitic rock, probably granitic gneiss

Quartz–feldspar–mica gneiss; locally pegmatitic granite

Slate (Slate (Metamorphic silicate rock)) — metamorphic

Slate

Slate (Metamorphic silicate rock)

Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

Greenschist (Greenschist (Chlorite-actinolite schist)) — metamorphic

Greenschist

Greenschist (Chlorite-actinolite schist)

Jadeite (NaAlSi2O6) — mineral

Jadeite

NaAlSi2O6

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Hard Sandstone (Quartzite) (Quartz-rich Sedimentary Rock (Proto-Quartzite)) — metamorphic

Hard Sandstone (Quartzite)

Quartz-rich Sedimentary Rock (Proto-Quartzite)

Greenschist (Greenschist (containing Chlorite, Actinolite, and Epidote)) — metamorphic

Greenschist

Greenschist (containing Chlorite, Actinolite, and Epidote)

Prehnite (Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Ca2Al(AlSi3O10)(OH)2

Prehnite (Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Ca2Al(AlSi3O10)(OH)2