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

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

Actinolite

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

Epidote in Quartz ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) mixed with SiO2) — metamorphic

Epidote in Quartz

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) mixed with SiO2

Epidote with Magnetite/Hematite inclusions (Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides) — mineral

Epidote with Magnetite/Hematite inclusions

Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — sedimentary

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

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)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Lapis Lazuli (Low Grade) (Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)) — metamorphic

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

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)

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

Green Schist

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

Greenstone / Greenschist (Greenschist (metamorphosed mafic rock)) — metamorphic

Greenstone / Greenschist

Greenschist (metamorphosed mafic rock)

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

Banded gneiss

Gneiss; typically quartz–feldspar–mica assemblage

Schist (specifically Chlorite/Greenschist) (Chlorite Schist) — metamorphic

Schist (specifically Chlorite/Greenschist)

Chlorite Schist

Eclogite (Eclogite (Omphacite-Garnet Rock)) — metamorphic

Eclogite

Eclogite (Omphacite-Garnet Rock)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Greenschist

Greenschist (containing Chlorite, Actinolite, and Epidote)

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

Ferruginous Sandstone

Clastic Sedimentary Rock (Iron-rich)

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

Greenschist

Greenschist (containing Chlorite, Epidote, and Actinolite)

Slate (Slate (Metamorphic silicate rock)) — metamorphic

Slate

Slate (Metamorphic silicate rock)

Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

Fuchsite (Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)

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

Prehnite

Ca2Al(AlSi3O10)(OH)2

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

Prehnite

Ca2Al(AlSi3O10)(OH)2

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

Argillite (with Barnacles)

Argillite (metamorphosed mudstone/shale)

Greenstone (Metabasalt / Chlorite Schist) — metamorphic

Greenstone

Metabasalt / Chlorite Schist

Slate with Quartz (Low-grade Metamorphic Slate with SiO2 inclusions) — metamorphic

Slate with Quartz

Low-grade Metamorphic Slate with SiO2 inclusions

Gray Slate Pebble (Slate (metamorphosed mudstone/shale)) — metamorphic

Gray Slate Pebble

Slate (metamorphosed mudstone/shale)

Slate (Slate (Metamorphosed Mudstone/Shale)) — metamorphic

Slate

Slate (Metamorphosed Mudstone/Shale)

Greenstone (Metabasalt / Greenschist facies rock) — metamorphic

Greenstone

Metabasalt / Greenschist facies rock

Greenstone (Epidisite / Chlorite Schist) (Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) and Chlorite)) — metamorphic

Greenstone (Epidisite / Chlorite Schist)

Metabasalt (often contains Epidote Ca2Al2(Fe3+,Al)(SiO4)(Si2O7)O(OH) and Chlorite)

Greenstone / Graywacke (Metagraywacke (Chlorite-grade schistose rock)) — metamorphic

Greenstone / Graywacke

Metagraywacke (Chlorite-grade schistose rock)

Epidote Water-Worn Pebble (Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — metamorphic

Epidote Water-Worn Pebble

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

Fuchsite in Quartz (or Emerald in Fuchsite / Verdite) (Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartz Matrix) — metamorphic

Fuchsite in Quartz (or Emerald in Fuchsite / Verdite)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartz Matrix

Jadeite Jade (Jadeite (NaAlSi2O6)) — metamorphic

Jadeite Jade

Jadeite (NaAlSi2O6)

Greenstone (Greenschist (Metamorphosed Mafic Rock)) — metamorphic

Greenstone

Greenschist (Metamorphosed Mafic Rock)

Greenstone / Greenschist (Greenschist (composed of Chlorite, Epidote, and Actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Greenstone (Metabasalt (Greenstone facies)) — metamorphic

Greenstone

Metabasalt (Greenstone facies)

Greenstone (Metabasalt / Greenstone) — metamorphic

Greenstone

Metabasalt / Greenstone

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)