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

Gneiss Pebble (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss Pebble

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Mica Schist (Mica Schist (Silicate rock)) — metamorphic

Mica Schist

Mica Schist (Silicate rock)

Banded Gneiss (Banded Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Banded Gneiss (Metamorphic Rock)

Gneiss (Gneiss (foliated metamorphic rock)) — metamorphic

Gneiss

Gneiss (foliated metamorphic rock)

Quartz-rich metamorphic rock, possibly quartzite (Quartzite; primarily crystalline silicon dioxide (SiO₂), with minor feldspar, mica, or iron oxides) — metamorphic

Quartz-rich metamorphic rock, possibly quartzite

Quartzite; primarily crystalline silicon dioxide (SiO₂), with minor feldspar, mica, or iron oxides

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

Garnet Schist

Mica Schist with Almandine (Fe3Al2(SiO4)3)

Weathered gray-green metamorphic pebble (Probable greenschist or chlorite-rich metavolcanic rock; exact identification requires testing) — metamorphic

Weathered gray-green metamorphic pebble

Probable greenschist or chlorite-rich metavolcanic rock; exact identification requires testing

Weathered mica schist (Mica schist, typically muscovite/biotite–quartz schist) — metamorphic

Weathered mica schist

Mica schist, typically muscovite/biotite–quartz schist

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Garnet (Almandine variety) (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine variety)

Almandine Garnet (Fe3Al2(SiO4)3)

Likely pyrite-bearing rock (Pyrite (FeS₂), possibly in a quartz- or sulfide-rich matrix) — mineral

Likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz- or sulfide-rich matrix

Unakite (Altered Granite (Epidotized Granite)) — metamorphic

Unakite

Altered Granite (Epidotized Granite)

Apatite (Ca5(PO4)3(F,Cl,OH)) — mineral

Apatite

Ca5(PO4)3(F,Cl,OH)

Septarian Nodule or Concretion (Calcareous concretion with argillaceous and sideritic components) — sedimentary

Septarian Nodule or Concretion

Calcareous concretion with argillaceous and sideritic components

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Mica Schist (Mica Schist (primarily composed of Muscovite/Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily composed of Muscovite/Biotite)

Muscovite Schist (Muscovite Schist (KAl2(AlSi3O10)(OH)2 matrix)) — metamorphic

Muscovite Schist

Muscovite Schist (KAl2(AlSi3O10)(OH)2 matrix)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (River Cobble) (Gneiss) — metamorphic

Gneiss (River Cobble)

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Granitic Gneiss (Gneiss (containing Potassium Feldspar and Quartz)) — metamorphic

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Gneiss (Granitic Gneiss) (Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Muscovite Schist (Mica Schist (primarily KAl2(AlSi3O10)(OH)2)) — metamorphic

Muscovite Schist

Mica Schist (primarily KAl2(AlSi3O10)(OH)2)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Rounded fossil fragment, possibly fossiliferous limestone (Unidentified carbonate fossil or fossil-bearing limestone; exact fossil cannot be determined from the photograph) — fossil

Rounded fossil fragment, possibly fossiliferous limestone

Unidentified carbonate fossil or fossil-bearing limestone; exact fossil cannot be determined from the photograph

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Chert (Jasper) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Jasper)

Cryptocrystalline Silica (SiO2)

Pearl-bearing oyster shell (Nacreous shell, primarily aragonite (CaCO₃), with natural pearls (calcium-carbonate nacre)) — fossil

Pearl-bearing oyster shell

Nacreous shell, primarily aragonite (CaCO₃), with natural pearls (calcium-carbonate nacre)

Banded Gneiss (Gneiss (Metamorphic high-grade rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Gneiss with Quartz Veining (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss with Quartz Veining

Gneiss (High-grade metamorphic rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Concretion (Siderite or Ironstone Concretion) — sedimentary

Concretion

Siderite or Ironstone Concretion

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

Gneiss

Gneiss (High-grade metamorphic rock)

Ironstone (iron-oxide-rich rock) (Ferruginous sandstone or ironstone; likely composed chiefly of goethite and/or limonite, with quartz and clay) — sedimentary

Ironstone (iron-oxide-rich rock)

Ferruginous sandstone or ironstone; likely composed chiefly of goethite and/or limonite, with quartz and clay