Gneiss
Gneiss (High-grade regional metamorphic rock)
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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Schist
Mica Schist (Metamorphic Rock)
metamorphic
Gneiss (likely)
Gneiss
Metamorphic
Mica-rich schist, likely lepidolite or muscovite schist
Mica schist; predominantly muscovite KAl₂(AlSi₃O₁₀)(OH)₂, possibly lithium-rich lepidolite
metamorphic
Quartz-veined Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Garnet (specifically Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Sillimanite
Al2O3(SiO2)
mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Biotite–quartz–feldspar gneiss
Gneiss, composed chiefly of quartz (SiO₂), feldspar, and dark mica, likely biotite
metamorphic
Garnet (Almandine or Pyrope)
Garnet group; (Fe,Mg)3Al2(SiO4)3
gemstone
Schist
Mica Schist
metamorphic
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
metamorphic
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Gneiss with Orthoclase Feldspar
Gneissic Metamorphic Rock with K-Feldspar inclusions
metamorphic
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH,F,O)4)
mineral
Gneiss (Metamorphic Cobble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
metamorphic
Mica Sand / Vermiculite
Phyllosilicate group (typically Biotite or Muscovite)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Blue Quartz (specifically Dumortierite Quartz)
SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)
mineral
Black Tourmaline
Schorl (complex sodium iron aluminum borosilicate)
mineral
Garnet (Spessartine / Almandine)
Fe3Al2(SiO4)3 to Mn3Al2(SiO4)3 (Nesosilicate)
mineral
Schist
Mica Schist
metamorphic
River Pebble (Gneiss / Granitic Schist)
Metamorphic Rock (Quartz-Feldspar-Mica assembly)
metamorphic
Gneissic Granite
Granite Gneiss
metamorphic
Schist/Phyllite
Metamorphic Schist (Chlorite Schist variety)
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Garnet
Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3
mineral