Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Zircon
Zircon (ZrSiO4)
Mineral
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Greenschist (or Serpentinite) with Quartz-Feldspar Vein
Metabasalt / Greenschist Facies Rock
metamorphic
Weathered foliated metamorphic rock, likely schist or phyllite
Micaceous quartz–feldspar schist/phyllite; exact identification requires microscopy or testing
metamorphic
Slate
Slate (Metamorphic Rock)
metamorphic
Greenstone (Epidote/Chlorite Rich Rock)
Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
metamorphic
Likely weathered mica-rich rock fragment
Probable schist, composed mainly of quartz, feldspar, and mica
metamorphic
Sandstone Concretion
Sedimentary concretion
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)
sedimentary
Ironstone Pebble
Sedimentary ironstone / Hematitic Sandstone
sedimentary
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Gneiss (Metamorphic Pebble)
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Siltstone River Rock
Siltstone (composed of silt-sized particles, silicate minerals)
sedimentary
Gneiss
Foliated Metamorphic Rock
metamorphic
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone
Sandstone (Quartzose/Feldspathic Sandstone)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Granite Pebble
Intrusive Igneous Rock (Felsic to Intermediate)
igneous
Vesicular Basalt with Quartz/Chalcedony
Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)
igneous
Slate
Slate (Metamorphic rock)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Sandstone
Sedimentary rock composed mainly of quartz sand
sedimentary
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Sandstone
Arenite
sedimentary
Banded Gneiss
Banded Gneiss (Metamorphic Rock)
metamorphic
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Serpentine
Serpentinite (composed primarily of Mg3Si2O5(OH)4)
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Lapis Lazuli
Lapis Lazuli (Metamorphic rock primarily composed of Lazurite, Calcite, and Pyrite)
rock
Weathered mica schist (tentative)
Mica schist, likely muscovite–biotite schist with quartz and feldspar
metamorphic
Quartzite
Quartzite (composed primarily of silica, SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Greenstone
Metabasalt (Greenstone)
metamorphic