Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Category
Sedimentary And Metamorphic
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
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Garnet-bearing Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Red Quartzite
Quartzite (SiO2)
metamorphic
Quartzite with inclusions
Quartzite (primarily SiO2)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Orange Moss Agate / Carnelian Agate
Silicon dioxide (SiO2) - variety Chalcedony
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Anthracite Coal
Anthracite (Carbon-based sedimentary rock typically classified as metamorphic)
metamorphic
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Banded Gneiss
Gneiss
metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2)
metamorphic
Gneiss
Banded orthogneiss or paragneiss, typically quartz–feldspar–mica bearing
metamorphic
Quartz-rich quartzite or silicified stone
Quartzite; predominantly microcrystalline quartz (SiO₂), with minor iron-oxide staining and possible feldspar/clay impurities
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
sedimentary
Zebra Jasper
Tectonized Jasper (Silicon Dioxide, SiO2)
sedimentary
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
sedimentary
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Tumbled pale greenish stone, likely serpentine or altered limestone
Probable serpentine-group rock (antigorite/lizardite), possibly serpentinite; identification is visual only
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Gneiss
High-grade regional metamorphic Gneiss
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)
metamorphic
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Mica Schist (with Golden/Biotite inclusions)
K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)
metamorphic
Graphite-rich schist (probable graphite ore)
Graphite schist; chiefly graphitic carbon (C) with quartz, mica, and possibly feldspar
metamorphic
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Garnet-Bearing Gneiss
Garnetiferous Feldspathic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
metamorphic
Quartzite River Cobble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss
Gneiss
metamorphic