Banded Gneiss
Foliated Gneiss
metamorphic
Category
Igneous Or Sedimentary (Anthropogenic Modification)
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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
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Garnet Amphibolite (or Garnet Gneiss)
Garnet amphibolite / Garnet-bearing metamorphic rock
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Fluorite in Matrix
Calcium Fluoride (CaF2) with Quartz/Calcite matrix
mineral
Gneiss (with iron staining)
Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Epidote (Unakite component) / Green Quartzite
Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
River Rock (likely Gneiss or Quartzite)
Metamorphic rock specimen (potentially Foliated Gneiss)
metamorphic
Agate in Matrix
Silicon Dioxide (SiO2) within host rock
mineral
Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Banded Gneiss
Gneiss
metamorphic
Banded Agate
Silicon Dioxide (SiO2)
mineral
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Chalcedony (Grey/White Agate)
Silicon Dioxide (SiO₂)
mineral
Weathered metamorphic rock, likely gneiss or schist
Indeterminate foliated silicate rock; commonly quartz–feldspar–mica assemblage
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic silicate rock)
metamorphic
Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (specifically a water-worn pebble)
Gneiss
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Dyed Quartz Geode
Dyed crystalline quartz (Silicon Dioxide, SiO2)
mineral