Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Category
Sedimentary To Metamorphic
Browse sedimentary to metamorphic specimens identified by the Rock Identifier community.
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Likely weathered metamorphic rock (quartzite or schist)
Quartz-rich foliated metamorphic rock; exact identification requires testing
metamorphic
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Greenschist
Chlorite schist
metamorphic
Garnet Schist
Almandine-Mica Schist
metamorphic
Greenschist
Chlorite schist
metamorphic
Mica Schist
Mica Schist (Silicate rock)
metamorphic
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
metamorphic
Mica Schist
Mica Schist (primarily composed of Muscovite/Biotite)
metamorphic
Milky Quartz in Matrix
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Banded gneiss (likely amphibolite-bearing gneiss)
Gneiss; quartz–feldspar–mica/amphibole aggregate
metamorphic
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite/Biotite Schist)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Quartz pebble
Silicon dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Botryoidal Pyrite
Iron Sulfide (FeS2)
mineral
Garnet
Garnet (X3Y2(SiO4)3)
mineral
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
sedimentary
Pyrite
Iron Disulfide (FeS2)
Mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Graphite
Graphite (Carbon, C)
metamorphic
Shale (possibly Carbonaceous or Oil Shale)
Argillaceous Sedimentary Rock
sedimentary
Banded gneiss
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Banded gneiss fragment
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Banded gneiss
Gneiss, likely biotite–quartz–feldspar gneiss
metamorphic
Slate
Slate; predominantly fine-grained phyllosilicates (muscovite/illite, chlorite) with quartz and feldspar
metamorphic
Quartzite Cobble
Metamorphic Quartzite (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral