Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Category
Anthropogenic Material
Browse anthropogenic material specimens identified by the Rock Identifier community.
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Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
mineraloid
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Chert (Arrowhead/Projectile Point)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Iron Slag (Industrial Byproduct)
Anthropogenic pyrometallurgical residue
mineral
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Iron Slag
Anthropogenic Ferro-silicate
mineral
Iron Slag
Anthropogenic Iron Silicate
industrial byproduct
Iron-rich concretion or slag-like mineral fragment
Likely limonite/goethite (FeO(OH)·nH₂O), possibly magnetite-bearing material
mineral
Cobalt Blue Slag Glass
Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives
mineraloid
Possible tektite or iron-rich slag-like natural specimen
Uncertain; possibly natural glass (tektite) or magnetite-rich rock
mineral
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Chert (Arrowhead/Tool variety)
Microcrystalline Quartz (SiO2)
sedimentary
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Slag (Industrial Glass/Byproduct)
Anthropogenic Vitreous Silicate
igneous (anthropogenic)
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
not a natural rock