Rock Identifier

Category

Metamorphic Rock

Browse metamorphic rock specimens identified by the Rock Identifier community.

River Cobble (Quartzite with Iron Staining) (Metamorphic Quartzite (SiO2 with Fe2O3 inclusions)) — metamorphic

River Cobble (Quartzite with Iron Staining)

Metamorphic Quartzite (SiO2 with Fe2O3 inclusions)

Quartzite Pebble (River Rock) (Metamorphic Quartzite (predominantly SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Serpentinite (Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)) — metamorphic

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Schist (Crystalline Schist (often containing Muscovite, Biotte, or Quartz)) — metamorphic

Schist

Crystalline Schist (often containing Muscovite, Biotte, or Quartz)

Unakite (Tumbled) (Epidotized Granite) — metamorphic

Unakite (Tumbled)

Epidotized Granite

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Limonitic Quartzite (Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining) — metamorphic

Limonitic Quartzite

Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — Mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Mica Schist (Mica Schist (predominantly Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Serpentine (Serpentinite) (Antigorite, Lizardite, or Chrysotile; (Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine (Serpentinite)

Antigorite, Lizardite, or Chrysotile; (Mg,Fe)3Si2O5(OH)4

Unakite (Unakite (metasomatized granite)) — metamorphic

Unakite

Unakite (metasomatized granite)

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Unakite (Unakite (Episyenite composition: Feldspar, Epidote, and Quartz)) — metamorphic

Unakite

Unakite (Episyenite composition: Feldspar, Epidote, and Quartz)

Red Quartzite (Ferruginous Quartz) (Quartzite (SiO2 with Fe2O3 inclusions)) — metamorphic

Red Quartzite (Ferruginous Quartz)

Quartzite (SiO2 with Fe2O3 inclusions)

Quartzite with Garnet (Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)) — metamorphic

Quartzite with Garnet

Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)

Quartzite (River Pebble) (SiO2 (recrystallized Quartz)) — metamorphic

Quartzite (River Pebble)

SiO2 (recrystallized Quartz)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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)

Unakite (Epidotized Granite) (Epidote-Feldspar-Quartz Rock) — metamorphic

Unakite (Epidotized Granite)

Epidote-Feldspar-Quartz Rock

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Serpentine (variety: Serpentine Rock) (Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine (variety: Serpentine Rock)

Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

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)

Mica Schist (Crystalline Schist (often containing Muscovite, Biotite, and Quartz)) — metamorphic

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Mica Schist with Pyrite (Muscovite/Biotite Schist with Iron Sulfide (FeS2)) — metamorphic

Mica Schist with Pyrite

Muscovite/Biotite Schist with Iron Sulfide (FeS2)

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

Biotite Mica

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

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Wishing Stone with Quartz Vein (Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)) — metamorphic

Wishing Stone with Quartz Vein

Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Riverstone Quartzite (Quartzite (primarily SiO2)) — metamorphic

Riverstone Quartzite

Quartzite (primarily SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz / Quartzite (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartz / Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Lapis Lazuli (Lapis lazuli (complex rock composed of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis lazuli (complex rock composed of Lazurite, Calcite, and Pyrite)