Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Category
Igneous Or Sedimentary
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Gneiss
High-grade regional metamorphic rock
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss Pebble
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz Pebble (Geode Nodules / Stream-Rounded Quartz)
Silicon Dioxide (SiO2)
mineral
Banded metamorphic rock, likely banded gneiss
Gneiss, probably biotite–quartz–feldspar gneiss
metamorphic
Banded Gneiss
Banded Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Quartz / Quartz Geode fragment
Silicon Dioxide (SiO2)
mineral
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Gneiss
Gneiss
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss (specifically a water-worn pebble)
Gneiss
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Gneissic Granite)
Gneiss
metamorphic
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Weathered foliated metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and mineral tests
metamorphic
Gneiss
Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Agate/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Gneiss (Schistose)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Common Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral