Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Category
Man Made Material (Metal)
Browse man made material (metal) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Metal) in the encyclopedia
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Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Opalite
Synthesized glass / Silicon dioxide glass
gemstone
Opalite
Synthetic glass / Simulated opal
gemstone
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Opalite
Synthetic glass / Opalized glass
gemstone
Faceted clear gemstone in a gold-colored setting
Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem
gemstone
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Opalite
Synthesized glass / Silicon dioxide
gemstone
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Opalite-style glass pendant
Man-made opalescent glass (not natural opal)
mineral
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Not a geological specimen
N/A (man-made object)
N/A
Opalite
Synthetic Opalized Glass
gemstone
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
mineraloid / anthropogenic
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Opalite
Synthetic Glass (Silica-based)
gemstone
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Anthropgenic (Industrial Byproduct)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
mineral
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Blue Goldstone
Aventurine Glass
man-made glass
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Blue-green cabochon, likely chalcedony or treated glass imitation
Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image
gemstone
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone