Gneiss
Foliated Metamorphic Rock
Category
Browse igneous and sedimentary specimens identified by the Rock Identifier community.
Gneiss
Foliated Metamorphic Rock
Gneiss (Banded Gneiss)
Gneiss
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Pyritic Gneiss
Metamorphic Gneiss with Pyrite inclusions
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Banded Gneiss
Gneiss
Gneiss
Gneiss (High-grade Metamorphic Rock)
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
Gneiss
Gneiss
Quartz Geode
Silicon Dioxide (SiO2)
Gneiss
Gneiss
Gneiss
High-grade metamorphic rock (Gneiss)
Gneiss (foliated metamorphic rock)
Gneiss
Gneiss
Gneiss
Gneiss
Gneiss
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Rough Precious Opal
Hydrated Silica (SiO2·nH2O)
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Chalcedony (River Stone)
Microcrystalline Quartz (SiO2)
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
Quartz Geode
Silicon Dioxide (SiO2)
Gneiss (Metamorphic Rock)
Gneiss
Gneiss (specifically Amphibolite Gneiss)
Gneiss
Jasper
Silicon dioxide (SiO2)
Agate Geode with Quartz Druzy
Cryptocrystalline Quartz (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Banded Gneiss
Gneiss (Metamorphic Rock)
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
Gneiss
Gneiss
Gneiss (with Quartzite and Mica)
Gneiss
Gneiss (Pebble)
Gneiss
Gneiss (with iron staining)
Gneiss
Gneiss
High-grade regional metamorphic rock (Foliated)
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss (High-grade Regional Metamorphism)
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)