Rock Identifier

Category

Metamorphic (Low Grade)

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

Learn about Metamorphic (Low Grade) in the encyclopedia

Greenschist

Slate

Granulite

Chlorite Schist

Chlorite Schist

Greenstone

Gneiss

Schist

Amphibolite

Garnet Schist

Migmatite

Biotite Schist

Khondalite

Jadeite Jade (NaAlSi2O6 (Sodium Aluminum Silicate)) — gemstone

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

wavellite (Al3(PO4)2(OH,F)3·5H2O) — mineral

wavellite

Al3(PO4)2(OH,F)3·5H2O

Fuchsite (Chrome Mica) (K(Al,Cr)2(AlSi3O10)(OH)2) — metamorphic

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Prehnite (Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2

Jadeite (NaAlSi2O6) — mineral

Jadeite

NaAlSi2O6

Greenschist (containing Epidote and Quartz) (Greenschist (Epidote-Chlorite-Actinolite Schist)) — metamorphic

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Greenstone (Greenschist) — metamorphic

Greenstone

Greenschist

Greenschist (Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)) — metamorphic

Greenschist

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

Greenstone (Protolith of basalt/gabbro (chlorite-epidote metamorphic facies)) — metamorphic

Greenstone

Protolith of basalt/gabbro (chlorite-epidote metamorphic facies)

Slate (Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)) — metamorphic

Slate

Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)

Tumbled greenstone or serpentine pebble (Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄); possibly nephrite jade if notably tough and dense) — metamorphic

Tumbled greenstone or serpentine pebble

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄); possibly nephrite jade if notably tough and dense

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

Epidote

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

Quartzite with Chlorite/Epidote (Metamorphosed Quartzite (SiO2)) — metamorphic

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Greenstone or Epidote-rich rock (Epidote or Chlorite schist/greenstone) — metamorphic

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

Greenschist (Greenschist (Chlorite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite Schist)

Jadeite Carving (Pixiu) (Jadeite (NaAlSi2O6)) — gemstone

Jadeite Carving (Pixiu)

Jadeite (NaAlSi2O6)

Foliated metamorphic rock, likely schist (Mica schist or chlorite schist; composition commonly quartz + mica/chlorite ± feldspar) — metamorphic

Foliated metamorphic rock, likely schist

Mica schist or chlorite schist; composition commonly quartz + mica/chlorite ± feldspar

Slate fragment (Slate; predominantly fine-grained mica/clay minerals, commonly muscovite, chlorite, and quartz) — metamorphic

Slate fragment

Slate; predominantly fine-grained mica/clay minerals, commonly muscovite, chlorite, and quartz

Biotite Schist (Metamorphic Rock (Schist)) — metamorphic

Biotite Schist

Metamorphic Rock (Schist)

Jadeite Jade (NaAlSi2O6) — metamorphic

Jadeite Jade

NaAlSi2O6

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

Epidote

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

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Jadeite (NaAlSi2O6) — gemstone

Jadeite

NaAlSi2O6

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Likely weathered sandstone or metasandstone (Quartz-rich sandstone (possibly weakly metamorphosed metasandstone)) — sedimentary

Likely weathered sandstone or metasandstone

Quartz-rich sandstone (possibly weakly metamorphosed metasandstone)

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

Epidote

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

Likely banded gneiss (Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica) — metamorphic

Likely banded gneiss

Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Greenstone Pebble (Metabasalt / Greenschist) — metamorphic

Greenstone Pebble

Metabasalt / Greenschist

Likely slate (Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals, chlorite, and quartz) — metamorphic

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals, chlorite, and quartz

Greenstone (likely chlorite- or epidote-rich metamorphic rock) (Greenstone; commonly metamorphosed basalt or dolerite, with chlorite, epidote, and actinolite) — metamorphic

Greenstone (likely chlorite- or epidote-rich metamorphic rock)

Greenstone; commonly metamorphosed basalt or dolerite, with chlorite, epidote, and actinolite

Green Slate (or Phyllite / Chlorite Schist slab) (Metamorphosed argillaceous rock (chloritic slate)) — metamorphic

Green Slate (or Phyllite / Chlorite Schist slab)

Metamorphosed argillaceous rock (chloritic slate)

Beach Pebble (Nephrite Jade / Chalcedony) (Ca2(Mg,Fe)5Si8O22(OH)2 / SiO2) — metamorphic

Beach Pebble (Nephrite Jade / Chalcedony)

Ca2(Mg,Fe)5Si8O22(OH)2 / SiO2

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

Serpentine

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

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

Actinolite

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

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

Green Schist

Greenschist (containing Chlorite, Actinolite, and Epidote)

Slate (Slate; predominantly fine-grained phyllosilicates, commonly muscovite/illite and chlorite with quartz) — metamorphic

Slate

Slate; predominantly fine-grained phyllosilicates, commonly muscovite/illite and chlorite with quartz

Quartz Veined Mudstone (Metasedimentary rock with Quartz (SiO2) veins) — metamorphic

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Greenstone (River Pebble) (Metabasalt / Greenschist) — metamorphic

Greenstone (River Pebble)

Metabasalt / Greenschist

Slate (Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)) — metamorphic

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

Epidote (Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))) — mineral

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

Yellow Jade (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)) — gemstone

Yellow Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)