Sulfur
Native Sulfur (S)
mineral
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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Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Asphalt fragment
Bituminous concrete
anthropogenic material
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Likely silicon carbide (carborundum)
Synthetic silicon carbide (SiC), likely blue-green crystalline grit
mineral
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Laterite (Red Clay)
Laterite (Fe2O3 · nH2O and Al2O3 · nH2O)
sedimentary
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
mineraloid / industrial byproduct
Bismuth
Bismuth (Bi)
mineral
Basalt
Basalt
igneous
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Chert (Arrowhead Preform or Point)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (with biological crust)
Arenite (SiO2 based)
sedimentary
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Granodiorite / Granite
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Coal
Carbonaceous sedimentary rock
sedimentary
Botryoidal chalcedony (likely moss or plume agate)
Microcrystalline quartz, SiO₂; chalcedony with possible iron/manganese inclusions
mineral
Granodiorite
Granodiorite
igneous
Schist
Mica Schist
metamorphic
Sandstone
Arenite (compositionally various, primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Weathered metallic sulfide ore, likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz–iron-oxide host
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Conglomeratic gravel / polymictic breccia
Polymictic rudite, likely anthropogenic or beach/stream gravel; composition varies
sedimentary
Green sea glass (likely bottle glass)
Human-processed soda–lime silicate glass; not a natural mineral or rock
mineral
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Sandstone
Arenite (SiO2 based)
sedimentary
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Green sea glass (likely slag glass or bottle glass)
Man-made soda-lime silicate glass; not a naturally occurring mineral
mineral
Basalt
Mafic Igneous Pebble
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary