Weathered, quartz-rich metamorphic rock (likely schist or gneiss)
Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining
metamorphic
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.
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Quartz-bearing metamorphic rock, likely mica schist or gneiss fragment
Muscovite–biotite schist/gneiss with quartz and feldspar
metamorphic
Schist/Phyllite
Metamorphic Schist (Chlorite Schist variety)
metamorphic
Gneiss
Gneiss (High-Grade Metamorphic Rock)
metamorphic
Dumortierite Quartz
Dumortierite (Al7BCuO15)
metamorphic
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
metamorphic
Banded metamorphic rock, likely gneiss
Foliated gneiss; chiefly quartz, feldspar, and dark mica/amphibole
metamorphic
Mixed garnet crystal specimens
Garnet-group silicates, likely almandine–spessartine with possible grossular/pyrope varieties; general formula X₃Y₂(SiO₄)₃
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Quartz vein in host rock
Milky quartz (SiO₂) with likely metamorphic country rock, possibly gneiss or schist
metamorphic
Banded Gneiss
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Quartz Vein in Gneiss or Schist
Metamorphic rock with SiO2 vein
metamorphic
Garnet, likely almandine–spessartine
Garnet-group nesosilicate; commonly almandine Fe₃Al₂(SiO₄)₃ or spessartine Mn₃Al₂(SiO₄)₃
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Red garnet bead
Likely almandine–pyrope garnet, garnet-group silicate (approximately Fe₃Al₂Si₃O₁₂–Mg₃Al₂Si₃O₁₂)
gemstone
Gneiss
Gneissic Metamorphic Rock
metamorphic
Graphite
Graphite (C)
mineral
Weathered granite or granitic gneiss
Granite, chiefly quartz–feldspar–mica; possible gneissic variant
igneous
Gneiss
Gneiss
metamorphic
Likely raw blue kyanite specimens
Kyanite, Al₂SiO₅
mineral
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Quartz-bearing rock fragment, likely quartz vein in basalt or dark host rock
Quartz (SiO₂) with probable mafic host, possibly basalt or amphibolite
igneous
Red garnet gemstone
Garnet group; likely almandine–pyrope, (Fe,Mg)₃Al₂(SiO₄)₃
gemstone
Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist, possibly with quartz and feldspar
metamorphic
Mica-bearing metamorphic rock, likely schist
Muscovite–biotite schist, possibly phyllite
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite)
metamorphic
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Garnet (likely Almandine)
Almandine Garnet, Fe3Al2(SiO4)3
mineral
Schist
Mica Schist
metamorphic
Biotite-rich granite or granitic gneiss
Quartz–feldspar–biotite granitoid; possibly foliated granite/gneiss
igneous
Schist
Mica Schist
metamorphic
Faceted red gemstone, likely garnet
Garnet group; probably almandine-pyrope solid solution, (Fe,Mg)₃Al₂(SiO₄)₃
gemstone
Blue mineral specimen, likely kyanite
Kyanite — Al₂SiO₅
mineral
Biotite Schist (with Garnet and Pyrite)
K(Mg,Fe)3AlSi3O10(OH,F)2 (Biotite focus)
metamorphic
Raw reddish-brown mineral specimen, possibly garnet
Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂); identification is uncertain from the blurred image
mineral
Biotite schist
Mica schist, chiefly quartz + biotite mica; approximate composition varies
metamorphic
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic