Greenstone
Greenschist / Meta-basalt
metamorphic
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
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River/Stream Pebble
Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)
Mineral, specifically a rock fragment
Pyrite Cubes in Matrix
Iron Disulfide (FeS2) in Host Matrix
mineral side rock
Mookaite Jasper
Radiolarite (Silicified radiolarian chert), SiO2
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Anthracite Coal
Anthracite (Carbon based)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Banded Gneiss
Banded Orthogneiss or Paragneiss (Quartz-Feldspathic Gneiss)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Mica Schist
Foliated Metamorphic Rock (Schist)
metamorphic
Gneiss
Foliated Metamorphic Gneiss
metamorphic
Ferruginous Sandstone with Quartz Inclusions
Clastic Sedimentary Rock (Iron-rich Sandstone)
sedimentary
Anthracite Coal
Anthracite coal (Carbon)
metamorphic
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Sandstone) with Iron Oxide (Fe2O3)
sedimentary
Breccia
Clastic Breccia
sedimentary
Quartz Crystal Point
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Gneiss
Gneiss
metamorphic
Granite Gneiss
Gneiss (quartz-feldspar dominated)
metamorphic
Mica Schist with Pyrite
Muscovite/Biotite Schist (Complex Silicate)
metamorphic
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Granite Gneiss
Felsic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic