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

Greenschist

Slate

Slate

Granulite

Granulite

Greenstone

Greenstone

Chlorite Schist

Chlorite Schist

Gneiss

Gneiss

Schist

Schist

Amphibolite

Amphibolite

Garnet Schist

Garnet Schist

Migmatite

Migmatite

Biotite Schist

Biotite Schist

Khondalite

Khondalite

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

Epidote

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

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Biotite Mica (K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2) — Mineral

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Gneiss (River Cobble) (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss (River Cobble)

Gneiss (Foliated Metamorphic Rock)

Schist (Micaceous Schist) (Schist (containing mainly Muscovite and Quartz)) — metamorphic

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Rough Tanzanite (Zoisite (Ca2Al3(SiO4)3(OH))) — mineral

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Pink Feldspar (Orthoclase (KAlSi3O8) or Microcline) — mineral

Pink Feldspar

Orthoclase (KAlSi3O8) or Microcline

Pyrite (Pyrite (Iron sulfide, FeS₂)) — mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sapphire in a ring (Corundum (Al2O3)) — mineral

Sapphire in a ring

Corundum (Al2O3)

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Gold Ore (in Quartz/Pyrite) (Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)) — mineral

Gold Ore (in Quartz/Pyrite)

Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)

Clear Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Gneiss (Foliated Metamorphic Rock (Gneiss)) — metamorphic

Gneiss

Foliated Metamorphic Rock (Gneiss)

Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads) (Silicon Dioxide (SiO2) with various inclusions) — mineral

Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)

Silicon Dioxide (SiO2) with various inclusions

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Rough Green Beryl (Emerald variety) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Rough Green Beryl (Emerald variety)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Orange Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Shale (possibly Carbonaceous or Oil Shale) (Argillaceous Sedimentary Rock) — sedimentary

Shale (possibly Carbonaceous or Oil Shale)

Argillaceous Sedimentary Rock

Ruby in Zoisite with Hornblende (Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))) — metamorphic

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

River Quartzite (River Rock) (Quartzite (SiO2)) — metamorphic

River Quartzite (River Rock)

Quartzite (SiO2)

Anthracite Coal (Anthracite C) — metamorphic

Anthracite Coal

Anthracite C

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Opal

Hydrated amorphous silica (SiO2·nH2O)

Serpentinite (Serpentinite (Mg, Fe, Ni)₃Si₂O―(OH)₄) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni)₃Si₂O―(OH)₄

Serpentine (Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)) — metamorphic

Serpentine

Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Banded Gneiss with Quartz Vein (Gneiss containing SiO2 (Quartz) intrusion) — metamorphic

Banded Gneiss with Quartz Vein

Gneiss containing SiO2 (Quartz) intrusion

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Metamorphosed Pebble) (Gneiss with Quartz/Feldspar banding) — metamorphic

Gneiss (Metamorphosed Pebble)

Gneiss with Quartz/Feldspar banding

Granite Gneiss (Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)) — metamorphic

Granite Gneiss

Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)

Gneiss (Granite Gneiss) (Gneiss) — metamorphic

Gneiss (Granite Gneiss)

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Schist with Biotite Inclusion (Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)) — metamorphic

Schist with Biotite Inclusion

Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Tiger's Eye (Silicon dioxide (SiO2) with fibrous inclusions of crocidolite) — Mineral

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sapphire (Rough Corundum) (Corundum (Aluminum Oxide, Al2O3)) — mineral

Sapphire (Rough Corundum)

Corundum (Aluminum Oxide, Al2O3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Mica Schist (Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)) — metamorphic

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss