Drill Core Sample
Cylindrical Rock Core (Specific mineralogy varies by extraction site)
Metamorphic (Likely Gneiss or Schist based on texture)
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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Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Mica Schist
Schist (Muscovite-Quartz Schist)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Muscovite Mica in Quartz
Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2) and Silicon Dioxide (SiO2)
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (SiO2 and varied Silicates)
metamorphic
Tumbled metamorphic pebble, likely gneiss
Foliated gneiss; commonly quartz, feldspar, mica, and amphibole
metamorphic
River Pebbles (Mixed Lithology)
Conglomerate clasts (Silica-rich and Metamorphic assemblages)
sedimentary
Gneiss
Gneiss
metamorphic
Likely biotite schist or mica-rich metamorphic rock
Mica schist, predominantly biotite mica with quartz and feldspar
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Schist
Schist
Metamorphic
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz with Mica (likely Muscovite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride
igneous/metamorphic
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Mica
Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2
mineral
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Garnet (Pyrope or Almandine)
Silicate (X3Y2Si3O12)
mineral
Graphite
Graphite (Native Carbon, C)
metamorphic
Biotite-bearing gneiss or schist
Quartz–feldspar–biotite metamorphic rock
metamorphic
Schist
Mica Schist (predominantly Muscovite or Biotite)
metamorphic
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Mica Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (Quartz-Biotit-Muscovite Schist)
metamorphic
Dark metamorphic rock, likely biotite schist or gneiss
Quartz–feldspar–biotite metamorphic rock; exact identification requires a fresh surface and testing
metamorphic
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Schist
Schist
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral