Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Man-made material (Anthro-lithic product)
Category
Man Made Material (Anthro Lithic Product)
Browse man made material (anthro lithic product) specimens identified by the Rock Identifier community.
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N/A - Non-Geological Item
not a rock/mineral
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Hematite
Iron(III) oxide (Fe2O3)
mineral
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Synthetic / Composite Material
Opalite
Man-made opalized glass
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Sea Glass
Man-made silicate glass
gemstone
Rounded graywacke or sandstone cobble
Lithified clastic sandstone; likely quartz–feldspar–lithic grain aggregate in a silica or calcite matrix
sedimentary
Unidentifiable Rock Fragment
Uncertain
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Sea Glass
Man-made silicate glass weathering product
sedimentary
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
mineraloid
Polished white calcite sphere (identification tentative)
Calcite, CaCO₃
mineral
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Engineerged Quartz (Quartz Composite)
SiO2 (Silicon Dioxide) in a polymer resin matrix
mineral
Acrylic or Resin (Synthetic Imitation)
Polymethyl Methacrylate (PMMA) or Polyepoxide
Synthetic/Man-made Polymer
Smelter Slag
Anthropogenic Silicate Slag
igneous
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Goldstone (Brown)
Aventurine Glass (Silicon Dioxide infused with Copper crystals)
mineraloid (man-made glass)
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Opalite
Synthetic glass / Opalized glass
gemstone
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral