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

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

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Serpentinite (Serpentine Rock) (Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.) — Metamorphic

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Muscovite (Mica) (Muscovite - KAl2(AlSi3O10)(OH)2) — Mineral

Muscovite (Mica)

Muscovite - KAl2(AlSi3O10)(OH)2

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Garnet (almandine or pyrope variety) (Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3) — mineral

Garnet (almandine or pyrope variety)

Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite Pebble (Metamorphosed Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

Quartzite (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite

SiO2 (Silicon Dioxide)

Ruby (Corundum (Al2O3)) — mineral

Ruby

Corundum (Al2O3)

Garnet (Almandine) (Almandine Garnet (Fe3Al2(SiO4)3)) — Mineral

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Schist (Micaceous Schist) (Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)) — metamorphic

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Serpentine Jade (New Jade/Olive Jade) (Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite) — Mineral

Serpentine Jade (New Jade/Olive Jade)

Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite

Sand (Construction Grade) (Unconsolidated siliciclastic sediment (primarily SiO2)) — sedimentary

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

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

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Dumortierite Quartz (Blue Quartz) (Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)) — mineral

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Biotite / Black Mica (K(Mg,Fe)3(AlSi3O10)(F,OH)2) — mineral

Biotite / Black Mica

K(Mg,Fe)3(AlSi3O10)(F,OH)2

Hypersthene (Hypersthene ((Mg,Fe)SiO₃)) — Mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Wishing Stone (Quartz-Veined Pebble) (Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)) — metamorphic

Wishing Stone (Quartz-Veined Pebble)

Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)

Lapis Lazuli (prominent blue specimen in collection) (Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2) — metamorphic

Lapis Lazuli (prominent blue specimen in collection)

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

Quartzite (Quartzite (consisting primarily of SiO2)) — metamorphic

Quartzite

Quartzite (consisting primarily of SiO2)

Nephrite Jade (Tremolite-Actinolite solid solution series, Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution series, Ca2(Mg,Fe)5Si8O22(OH)2

Quartzite (Aventurine type) (Metamorphosed Quartz Sandstone (SiO2 with inclusions)) — metamorphic

Quartzite (Aventurine type)

Metamorphosed Quartz Sandstone (SiO2 with inclusions)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

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

Garnet in Schist (Garnetiferous Micaceous Schist) (Almandine Garnet, Fe3Al2(SiO4)3) — metamorphic

Garnet in Schist (Garnetiferous Micaceous Schist)

Almandine Garnet, Fe3Al2(SiO4)3

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

White Jade (Nephrite or Jadeite) (Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)) — metamorphic

White Jade (Nephrite or Jadeite)

Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)

Nephrite Jade (Tremolite-Actinolite series: Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Tremolite-Actinolite series: Ca2(Mg,Fe)5Si8O22(OH)2

Quartzite (Quartzite (SiO2 prominent)) — metamorphic

Quartzite

Quartzite (SiO2 prominent)

Quartzite Pebble (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily Silicon Dioxide, SiO2)

Nephrite Jade (Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]

Petrified Wood (Silicified Wood (primarily SiO2)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2)

Lapis Lazuli (Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Orange Quartzite (Tumbled Beach Pebble) (Quartzite (primarily SiO2)) — metamorphic

Orange Quartzite (Tumbled Beach Pebble)

Quartzite (primarily SiO2)

Schist (Chlorite-Mica Schist) — metamorphic

Schist

Chlorite-Mica Schist

Nephrite Jade (Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution series [Ca2(Mg,Fe)5Si8O22(OH)2]

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)