Rock Identifier

Category

Metamorphic Or Sedimentary Depending On Local Grade

Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.

Learn about Metamorphic Or Sedimentary Depending On Local Grade in the encyclopedia

Greenschist

Granulite

Slate

Turbidite

Gneiss

Schist

Chlorite Schist

Chlorite Schist

Amphibolite

Garnet Schist

Migmatite

Biotite Schist

Khondalite

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Schist (Schist (various mineralogical compositions including mica, chlorite, talc, etc.)) — Metamorphic

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Schist (Schist (Metamorphic Rock)) — metamorphic

Schist

Schist (Metamorphic Rock)

Ruby in Quartz with Tourmaline (Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl) — metamorphic

Ruby in Quartz with Tourmaline

Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl

Serpentinite (or Green Quartz Pebble) (Mg3Si2O5(OH)4 (Serpentine group) / SiO2 (Quartz mix)) — metamorphic

Serpentinite (or Green Quartz Pebble)

Mg3Si2O5(OH)4 (Serpentine group) / SiO2 (Quartz mix)

Quartz-veined Sandstone Pebble (Quartzite-veined Arenite) — sedimentary

Quartz-veined Sandstone Pebble

Quartzite-veined Arenite

Garnet Schist (Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

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

Gneiss (probable banded metamorphic rock)

Banded gneiss; typically quartz–feldspar–mica assemblage

Greenstone / Serpentinite (Serpentine-group / Altered Mafic Rock) — metamorphic

Greenstone / Serpentinite

Serpentine-group / Altered Mafic Rock

Bacan Stone (Chrysocolla-in-Chalcedony) (Chrysocolla in Chalcedony (SiO2 with (Cu, Al)2H2Si2O5(OH)4·nH2O)) — mineral

Bacan Stone (Chrysocolla-in-Chalcedony)

Chrysocolla in Chalcedony (SiO2 with (Cu, Al)2H2Si2O5(OH)4·nH2O)

Marble (Metamorphosed Limestone (principally CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (principally CaCO3)

Dark gray metamorphic rock, likely slate or phyllite (Fine-grained foliated rock composed mainly of mica, chlorite, and quartz; exact identification requires testing) — metamorphic

Dark gray metamorphic rock, likely slate or phyllite

Fine-grained foliated rock composed mainly of mica, chlorite, and quartz; exact identification requires testing

Tsavorite Garnet (Grossular Garnet, Ca3Al2(SiO4)3) — gemstone

Tsavorite Garnet

Grossular Garnet, Ca3Al2(SiO4)3

Puddingstone (Conglomerate) — sedimentary

Puddingstone

Conglomerate

Red sandstone boulder (Quartz-rich sandstone, commonly arkose or iron-oxide-cemented sandstone) — sedimentary

Red sandstone boulder

Quartz-rich sandstone, commonly arkose or iron-oxide-cemented sandstone

Greenstone Celt (Polished Stone Axe) (Metamorphosed mafic rock (often Basalt or Diabase)) — metamorphic

Greenstone Celt (Polished Stone Axe)

Metamorphosed mafic rock (often Basalt or Diabase)

Green Aventurine (Aventurine Quartz (SiO2 with fuchsite inclusions)) — Mineral

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Milky Quartz with Talc / Serpentine (Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2) — metamorphic

Milky Quartz with Talc / Serpentine

Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2

Greenstone (likely altered basalt or serpentinite) (Chlorite-rich metabasalt or serpentinite; exact identification requires testing) — metamorphic

Greenstone (likely altered basalt or serpentinite)

Chlorite-rich metabasalt or serpentinite; exact identification requires testing

Garnet-bearing metamorphic rock, likely mica schist (Biotite–garnet schist; commonly includes quartz, feldspar, biotite, and almandine garnet) — metamorphic

Garnet-bearing metamorphic rock, likely mica schist

Biotite–garnet schist; commonly includes quartz, feldspar, biotite, and almandine garnet

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

Jadeite Carving (Pixiu)

Jadeite (NaAlSi2O6)

Dark gray foliated metamorphic rock, likely slate or phyllite (Slate/phyllite; commonly quartz, muscovite/illite, chlorite, and graphite or carbonaceous matter) — metamorphic

Dark gray foliated metamorphic rock, likely slate or phyllite

Slate/phyllite; commonly quartz, muscovite/illite, chlorite, and graphite or carbonaceous matter

Tourmaline crystal (Tourmaline Group (Complex Borosilicate)) — mineral

Tourmaline crystal

Tourmaline Group (Complex Borosilicate)

Mica Schist (Mica Schist) — metamorphic

Mica Schist

Mica Schist

Basalt (Weathered River Stone) (Basalt (Extrusive Mafic Igneous Rock)) — igneous

Basalt (Weathered River Stone)

Basalt (Extrusive Mafic Igneous Rock)

Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

Emerald (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald

Beryl (Be3Al2(SiO3)6)

Marble (Metamorphosed Limestone / Calcite or Dolomite) — metamorphic

Marble

Metamorphosed Limestone / Calcite or Dolomite

Greenish Metamorphic Rock (likely containing epidote or chlorite) (Metamorphic rock, possibly epidosite or greenstone) — Metamorphic

Greenish Metamorphic Rock (likely containing epidote or chlorite)

Metamorphic rock, possibly epidosite or greenstone

Kyanite (Kyanite (Al2SiO5)) — mineral

Kyanite

Kyanite (Al2SiO5)

Fossiliferous Limestone / Petoskey Stone (Coral Fossil) (Hexagonaria percarinata / Calcite (CaCO3)) — fossil

Fossiliferous Limestone / Petoskey Stone (Coral Fossil)

Hexagonaria percarinata / Calcite (CaCO3)

Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)

Zoisite with Hornblende (Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions) — metamorphic

Zoisite with Hornblende

Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions

Green Chalcedony Ring (Silicon Dioxide (SiO2)) — gemstone

Green Chalcedony Ring

Silicon Dioxide (SiO2)

Larimar (Pectolite, NaCa2Si3O8(OH)) — gemstone

Larimar

Pectolite, NaCa2Si3O8(OH)

Tumbled bronzite-bearing gneiss (likely) (Foliated silicate rock; chiefly orthopyroxene [(Mg,Fe)SiO₃], feldspar, quartz, and biotite) — metamorphic

Tumbled bronzite-bearing gneiss (likely)

Foliated silicate rock; chiefly orthopyroxene [(Mg,Fe)SiO₃], feldspar, quartz, and biotite

Garnet Schist (Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)) — metamorphic

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Manhattan Schist (Manhattan Schist (Aluminous Metasedimentary Rock)) — metamorphic

Manhattan Schist

Manhattan Schist (Aluminous Metasedimentary Rock)

Gray metamorphic rock, likely slate or phyllite (Fine-grained foliated rock, probably quartz–mica slate/phyllite) — metamorphic

Gray metamorphic rock, likely slate or phyllite

Fine-grained foliated rock, probably quartz–mica slate/phyllite

Quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar) — metamorphic

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar

Mica Schist (Metamorphic rock dominated by micas (muscovite, biotite)) — metamorphic

Mica Schist

Metamorphic rock dominated by micas (muscovite, biotite)

Greenschist (or Serpentinite) with Quartz-Feldspar Vein (Metabasalt / Greenschist Facies Rock) — metamorphic

Greenschist (or Serpentinite) with Quartz-Feldspar Vein

Metabasalt / Greenschist Facies Rock