Gneiss
Gneiss
metamorphic
Category
Igneous And Sedimentary
Browse igneous and sedimentary specimens identified by the Rock Identifier community.
Learn about Igneous And Sedimentary in the encyclopedia
View all →
Banded gneiss pebble
Gneiss, chiefly quartz–feldspar–mica with dark biotite/amphibole bands
metamorphic
Banded gneiss pebble
Biotite–quartz–feldspar gneiss (composition variable)
metamorphic
Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)
Quartz–feldspar–mica rock; exact identification requires testing
metamorphic
Gneiss (with Granite/Pegmatite Vein)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Banded Agate
Chalcedony (SiO2) with impurities
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Mineral
Banded Agate (specifically Sardonyx or Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Granitoid Gneiss with Feldspar Vein
Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)
metamorphic
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (quartz-feldspar-biotite metamorphic rock)
metamorphic
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
igneous, sedimentary, metamorphic, mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
mineral
Carnelian
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Green Fluorite (Beaded)
Fluorite (Calcium Fluoride, CaF2)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz Druzy
Crystalline Silicon Dioxide (SiO2)
mineral
Rough Agate/Chert Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded gneiss
Gneiss, commonly quartz–feldspar–biotite gneiss
metamorphic
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica banded rock
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
mineral
Gneiss (with Quartz and Mica)
Gneiss
metamorphic
Gneiss
Metamorphic rock of high-grade regional metamorphism
metamorphic
Weathered banded metamorphic rock, likely gneiss
Banded gneiss; commonly quartz–feldspar–mica assemblage
metamorphic