Rock Identifier

Category

Metamorphic (Likely Gneiss Or Schist Based On Texture)

Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.

Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia

Gneiss

Schist

Tourmaline Schist

Tourmaline Schist

Graphite Schist

Graphite Schist

Staurolite Schist

Staurolite Schist

Paragonite Schist

Paragonite Schist

Chlorite Schist

Chlorite Schist

Hornblende Schist

Hornblende Schist

Garnet Schist

Mica Schist

Talc Schist

Biotite Schist

Reddish-brown crystalline rock, possibly weathered granite or garnet-bearing schist (Indeterminate; likely quartz–feldspar–mica rock with iron oxides, potentially garnet-bearing) — metamorphic

Reddish-brown crystalline rock, possibly weathered granite or garnet-bearing schist

Indeterminate; likely quartz–feldspar–mica rock with iron oxides, potentially garnet-bearing

Weathered banded metamorphic rock, likely gneiss (Banded gneiss; commonly quartz–feldspar–mica assemblage) — metamorphic

Weathered banded metamorphic rock, likely gneiss

Banded gneiss; commonly quartz–feldspar–mica assemblage

Likely raw garnet fragment (Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)) — mineral

Likely raw garnet fragment

Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)

Quartz-rich metamorphic rock, likely mica schist or gneiss (Quartz–feldspar–mica schist/gneiss; commonly containing biotite or muscovite) — metamorphic

Quartz-rich metamorphic rock, likely mica schist or gneiss

Quartz–feldspar–mica schist/gneiss; commonly containing biotite or muscovite

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Schist (Mica Schist (Metamorphic Rock)) — metamorphic

Schist

Mica Schist (Metamorphic Rock)

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

Quartz / Quartzite

Silicon Dioxide (SiO2)

Gneiss (Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)) — metamorphic

Gneiss

Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)

Mica Schist with Garnet inclusions (Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)) — metamorphic

Mica Schist with Garnet inclusions

Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)

Garnet (Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)) — mineral

Garnet

Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)

Banded gneiss (Quartz–feldspar–biotite gneiss (exact minerals uncertain from the photo)) — metamorphic

Banded gneiss

Quartz–feldspar–biotite gneiss (exact minerals uncertain from the photo)

Schist (Metamorphic Rock (Mica Schist)) — metamorphic

Schist

Metamorphic Rock (Mica Schist)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (likely garnet-bearing or migmatitic gneiss) (Felsic banded gneiss; chiefly quartz, feldspar, mica, and possibly garnet) — metamorphic

Gneiss (likely garnet-bearing or migmatitic gneiss)

Felsic banded gneiss; chiefly quartz, feldspar, mica, and possibly garnet

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Biotite (Black Mica)

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

Kyanite-bearing metamorphic rock (Blue kyanite (Al₂SiO₅), likely in mica- and garnet-rich schist) — metamorphic

Kyanite-bearing metamorphic rock

Blue kyanite (Al₂SiO₅), likely in mica- and garnet-rich schist

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

Biotite Mica

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

Gneiss with Quartz Vein (Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection) — metamorphic

Gneiss with Quartz Vein

Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection

Mica-bearing metamorphic rock, likely schist (Muscovite/biotite mica schist with quartz and feldspar) — metamorphic

Mica-bearing metamorphic rock, likely schist

Muscovite/biotite mica schist with quartz and feldspar

Schist (Crystalline Metamorphic Rock (Schistose)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schistose)

Milky Quartz with Mica (Gneiss/Schist influence) (Silicon Dioxide (SiO2) with Phyllosilicates) — igneous/metamorphic

Milky Quartz with Mica (Gneiss/Schist influence)

Silicon Dioxide (SiO2) with Phyllosilicates

igneous/metamorphic

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

Biotite (Black Mica)

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

Garnet crystals (Garnet-group silicates, likely almandine (Fe₃Al₂Si₃O₁₂)) — mineral

Garnet crystals

Garnet-group silicates, likely almandine (Fe₃Al₂Si₃O₁₂)

Weathered quartz-bearing metamorphic rock (Likely quartz–feldspar schist or gneiss, possibly with iron-oxide alteration) — metamorphic

Weathered quartz-bearing metamorphic rock

Likely quartz–feldspar schist or gneiss, possibly with iron-oxide alteration

Mica Schist (Mica Schist (contains Muscovite/Biotite, Quartz)) — metamorphic

Mica Schist

Mica Schist (contains Muscovite/Biotite, Quartz)

Gneiss (with Quartz-Feldspar vein) (Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)) — metamorphic

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

Quartzite Cobble (Metamorphosed Quartz Sandstone (primarily SiO2)) — metamorphic

Quartzite Cobble

Metamorphosed Quartz Sandstone (primarily SiO2)

Almandine Garnet in Matrix (Almandine (Fe3Al2(SiO4)3)) — metamorphic

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

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

Biotite (Black Mica)

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

Biotite-rich mica schist (tentative) (Mica schist, dominated by biotite; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂) — metamorphic

Biotite-rich mica schist (tentative)

Mica schist, dominated by biotite; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂

Possible weathered mica-rich metamorphic fragment (Mica schist or phyllite (quartz–mica assemblage; identification uncertain from image)) — metamorphic

Possible weathered mica-rich metamorphic fragment

Mica schist or phyllite (quartz–mica assemblage; identification uncertain from image)

Gneiss (Metamorphic rock of high-grade regional metamorphism) — metamorphic

Gneiss

Metamorphic rock of high-grade regional metamorphism

Fuchsite with Ruby (Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite with Ruby

Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

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

Aquamarine

Beryl (Be3Al2(SiO3)6)

Red Garnet (likely Almandine or Pyrope) (Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)) — mineral

Red Garnet (likely Almandine or Pyrope)

Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)

Banded gneiss (Gneiss; typically quartz–feldspar–biotite ± amphibole) — metamorphic

Banded gneiss

Gneiss; typically quartz–feldspar–biotite ± amphibole

Schist (Mica Schist (Variable chemistry, often rich in muscovite and biotite)) — metamorphic

Schist

Mica Schist (Variable chemistry, often rich in muscovite and biotite)