Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Category
Antropogenic Rock (Man Made)
Browse antropogenic rock (man made) specimens identified by the Rock Identifier community.
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Rounded gray pebble, likely quartzite
Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image
metamorphic
Granite
Phaneritic plutonic felsic rock
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Granite
Intrusive Igneous Rock (Granitic)
igneous
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Colorless faceted gemstone, likely glass or cubic zirconia
Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant
gemstone
Colorless faceted quartz-like gemstone
Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia
gemstone
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Fossil Coral
Scleractinia (Stony Coral) fossil
fossil
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (mostly SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
gemstone
Mixed polished gemstone and mineral collection
Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces
gemstone
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Porphyry
Porphyritic Igneous Rock
igneous
Quartzite
Metamorphic quartz rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary