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.
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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
Synthetic glass / Opalized glass
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
Synthetic glass / Opaque silicious glass
gemstone
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
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
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
mineraloid / anthropogenic
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Anthropgenic (Industrial Byproduct)
Opalite
Synthetic Glass (Silica-based)
gemstone
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Blue Goldstone
Aventurine Glass
man-made glass
Blue-green cabochon, likely chalcedony or treated glass imitation
Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image
gemstone
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
mineral
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral