Fuchsite in Quartz (or Emerald in Fuchsite / Verdite)
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartz Matrix
metamorphic
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia
View all →
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Fine-grained mafic rock, likely basalt or altered basalt
Basalt; chiefly plagioclase feldspar and pyroxene, with possible chlorite/serpentine alteration
igneous
Mica schist
Mica schist (Muscovite and Biotite group)
metamorphic
Unable to Identify (Image Obscured)
Indeterminate
Rounded granitic gneiss or granite cobble
Granite; primarily quartz, plagioclase and potassium feldspar with biotite/hornblende
igneous
Muscovite Mica (with Quartz matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Biotite-rich schist (mica schist)
Mica schist; predominantly biotite mica, quartz, and feldspar
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz with Mica Schist
Quartz-Mica Schist / Pegmatitic Quartz
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Mixed stream gravel and common rock specimens
Predominantly quartz-rich granitoid, quartzite, sandstone, shale/slate, and mafic volcanic fragments; exact species cannot be determined confidently from the image
igneous, sedimentary, metamorphic
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
metamorphic
Gneiss
Gneiss
metamorphic
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite micas)
metamorphic
Sandstone
Arenite (predominantly SiO2)
sedimentary
Mica Schist
Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)
metamorphic
Schist
Mica Schist
metamorphic
Gneiss
Gneiss
metamorphic
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Schist
Metamorphic Rock (Schist)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Schist
Chlorite-Mica Schist
metamorphic
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
River Pebble (Gneiss or Quartzite variant)
Course-grained Metamorphic Rock (likely SiO2 dominant)
metamorphic
Biotite Schist
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Gneiss (specifically a water-worn pebble)
Gneiss
metamorphic
Green Gneiss
Metamorphic Gneiss
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)
metamorphic
Schist
Mica Schist
metamorphic
Granite pebble
Granite, typically quartz–feldspar–mica aggregate
igneous
Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic