Chert (often called Flint in archaeological contexts)
Microcrystalline or cryptocrystalline Silica (SiO2)
sedimentary
Category
Anthropogenic Material
Browse anthropogenic material specimens identified by the Rock Identifier community.
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Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
mineraloid
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Slag
Anthropogenic silicate slag
igneous
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
Sea Glass
Man-made silicate glass
mineral
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Sea Glass
Anthropogenic Silicate Glass
mineral
Slag
Anthropogenic silicate slag
igneous
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
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Iron Slag
Anthropogenic pyrometallurgical residue
industrial byproduct
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary