Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Category
Igneous, Metamorphic, Sedimentary
Browse igneous, metamorphic, sedimentary specimens identified by the Rock Identifier community.
Learn about Igneous, Metamorphic, Sedimentary in the encyclopedia
View all →
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Granite Gneiss
Gneiss (containing quartz, alkali feldspar, plagioclase, biotite/amphibole)
metamorphic
Ruby in Zoisite
Anyolite (composite of Corundum Al2O3 and Zoisite Ca2Al3(SiO4)(Si2O7)O(OH))
metamorphic
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Feldspathic Gneiss (Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Gneissic Metamorphic Rock
metamorphic
Schist (Chlorite or Mica-rich)
Chlorite Schist
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Garnet in Matrix
Almandine or Pyrope Garnet (X3Y2(SiO4)3) in Schist or Eclogite matrix
metamorphic
K2 Stone
Azurite in Granite
igneous
Gneiss (specifically Epidote-Quartz Gneiss)
Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)
metamorphic
Gneiss (River Cobble)
Gneiss
metamorphic
Garnet Gneiss
Gneiss containing Almandine Garnet
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Mica Schist
Schist (Muscovite/Biotite Schist)
metamorphic
Greenstone / Greenschist
Greenschist facies metamorphic rock
metamorphic
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Amphibolite
Amphibolite (rich in amphibole and plagioclase feldspar)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Quartz (Raw Crystal)
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic