Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
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 Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Iron-stained Quartz Vein
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Serpentine
Antigorite/Chrysotile/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Bauxite
Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))
sedimentary
Garnet Schist
Garnetiferous Mica Schist
metamorphic
Granodiorite Pebble
Granodiorite
igneous
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Brecciated jasper (likely ocean jasper or rhyolitic jasper)
Silica-rich volcanic breccia composed mainly of microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and possible feldspar
igneous
Sulfur
Native Sulfur (S)
mineral
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Preform or Point)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Coal
Carbonaceous sedimentary rock
sedimentary
Anthracite Coal with Sulfur staining
Anthracite (Carbon C with impurities)
metamorphic
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Granodiorite (containing Biotite and Quartz)
Granodiorite (Plagioclase-rich phaneritic intrusive rock)
igneous
Ferruginous Sandstone
Ferruginous Clastic Sedimentary Rock
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Pumice (specifically a water-worn, weathered variety)
Vesicular volcanic glass
igneous
Iron meteorite fragment
Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment
meteorite
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Peridotite
Peridotite (varieties include Dunite, Lherzolite, Harzburgite)
igneous
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (or Diamond Simulant)
C (Carbon) or synthetic equivalent
gemstone
Ferruginous Sandstone
Clastic Sedimentary Rock (Sandstone with Iron Oxide cement)
sedimentary
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous