Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Chert (Flint Nodule)
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Likely metallic meteorite fragment
Unclassified iron-rich meteorite; possible stony-iron or iron meteorite
meteorite
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Chert (Flint Nobule)
Silicon Dioxide (SiO2)
sedimentary
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Schist
Mica Schist
metamorphic
Chert (Gravel pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock (Hydrothermal Veined)
igneous
Sandstone
Sandstone (SiO2 rich)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Fluorite (Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Sandstone
Sandstone (Quartz-rich sedimentary rock)
sedimentary
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Granite
Phaneritic plutonic rock (dominated by Quartz, Feldspar, and Mica)
igneous
Graphite
Graphite (Native Carbon, C)
metamorphic
Limestone
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 dominated clastic sedimentary rock)
sedimentary
Rounded reddish-brown pebble
Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Shale
Laminated Mudstone
sedimentary
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
sedimentary
Fossil-bearing sedimentary rock, possibly fossil wood or bone
Indeterminate silicified/carbonate fossil in sandstone or mudstone
fossil
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Moss Agate (Crescent Moon Shape)
Silicon Dioxide (SiO2) with iron/manganese inclusions
mineral
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Generic Rock / Pebble
Undetermined rock specimen
sedimentary