N/A - Non-Geological Item
not a rock/mineral
Category
Man Made
Browse man made specimens identified by the Rock Identifier community.
Learn about Man Made in the encyclopedia
View all →
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Opalite
Synthetic glass / Opalized glass
gemstone
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Blue goldstone (man-made glass)
Copper-bearing aventurine glass; synthetic silicate glass
mineral
Opalite
Synthesized glass / Silicon dioxide glass
gemstone
Opalite
Synthetic glass / Simulated opal
gemstone
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Green obsidian (likely molded or heat-treated glass-like specimen)
Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)
igneous
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
mineral
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Not a geological specimen
N/A (man-made object)
N/A
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made vitreous material
gemstone
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made vitreous material
mineral
Opalite (likely man-made glass)
Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives
mineral
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Blue Obsidian (Cullet Glass)
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
mineral
Opalite
Man-made opalescent glass
gemstone
Opalite
Man-made opalized glass
mineral
Goldstone
Aventurine Glass (Man-made)
mineral
Sea Glass
Man-made silicate glass
gemstone
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Dyed Imperial Jasper (Sea Sediment Jasper)
Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony
sedimentary
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Blue Diamond
Carbon with Boron impurities (C)
gemstone
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)