Weathered garnet-bearing gneiss
Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃
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.
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Schist
Mica Schist
metamorphic
Greenschist
Chlorite schist
metamorphic
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss
metamorphic
Foliated Gneiss (River-Worn Pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Soapstone (Talc Schist)
Steatite
metamorphic
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Weathered granite or granitic gneiss pebble
Granite; chiefly quartz, feldspar, and mica
igneous
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Magnetite-rich iron ore (probable magnetite schist)
Magnetite (Fe₃O₄) in a foliated metamorphic matrix, possibly magnetite–biotite schist
metamorphic
Schist
Chlorite or Mica Schist
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Mineral
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Schist
Mica Schist
metamorphic
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Fossil Crab
Decapoda (likely Avitelmessus or Raninidae family)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Schist (Greenschist / Mica Schist)
Foliated Metamorphic Rock (rich in chlorite, muscovite, and quartz)
metamorphic
Biotite-rich gneiss (probable)
Foliated quartz–feldspar–biotite gneiss; composition commonly includes quartz (SiO₂), feldspar, and biotite mica
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Ammonite Fossil (Iridiscent)
Ammonoidea (subclass)
fossil
Granite or granitic gneiss
Felsic granitoid, chiefly quartz, feldspar, and mica; possibly weakly foliated gneiss
igneous
Schist
Mica Schist
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Schist
Schist (containing Quartz, Mica, and Amphibole)
metamorphic