Gneiss
High-grade regional metamorphic rock
metamorphic
Category
Igneous And Sedimentary
Browse igneous and sedimentary specimens identified by the Rock Identifier community.
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River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Weathered foliated metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and mineral tests
metamorphic
Gneiss Pebble
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss
metamorphic
Quartz Pebble (Beach Agate / Chalcedony Pebble)
Silicon Dioxide (SiO2)
mineral
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Common Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Gneiss
Gneiss
metamorphic
Gneiss (Schistose)
Gneiss
metamorphic
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Agate (Onyx variant)
Silicon dioxide (SiO2)
sedimentary
Weathered gray metamorphic rock, likely gneiss or schist
Probable quartz–feldspar–mica gneiss/schist; exact identification requires a fresh surface and tests
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss
Banded Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite Gneiss
Granitic Gneiss
Metamorphic
Dyed Quartz Geode
Dyed crystalline quartz (Silicon Dioxide, SiO2)
mineral
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
metamorphic
Quartz Geode
Silicon dioxide (SiO2)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
metamorphic
Crackle Agate / Dyed Quartz
SiO2 (Silicon Dioxide)
mineral
Quartz Drusy on Matrix
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic