Copper Nugget
Native Copper (Cu)
mineral
Category
Man Made Alloy (Metallic)
Browse man made alloy (metallic) specimens identified by the Rock Identifier community.
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Silver (S925)
Native Silver (Ag)
mineral
Blue Obsidian
Volcanic Glass (SiO2 with inclusions)
igneous
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Moissanite
Silicon Carbide (SiC)
mineral
Copper
Native Copper (Cu)
mineral
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Iron meteorite (likely)
Fe–Ni metallic meteorite, commonly kamacite–taenite
meteorite
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
man-made glass
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Native Copper (Tumbled Nugget)
Cu (Native Element)
mineral
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Bismuth Crystal
Bismuth (element symbol Bi, atomic number 83)
mineral
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Likely galena-bearing ore
Galena (lead sulfide, PbS), possibly with quartz or calcite gangue
mineral
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
man-made glass
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
man-made glass
Iron Meteorite
Siderite (meteoritic iron, Fe-Ni alloy)
mineral
Michigan Float Copper
Native Copper (Cu)
mineral
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
mineral
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Sea Glass
Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature
mineral
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Iron Meteorite
Meteoritic Iron (Fe-Ni alloy)
meteorite
Slag (Anthropogenic Glass/Iron byproduct)
Ferro-silicate Slag
Anthropogenic (Man-made)
Native copper nugget
Copper (Cu), commonly with cuprite and copper-oxide alteration
mineral
Iron meteorite fragment (probable)
Fe–Ni metallic meteorite, commonly octahedrite (kamacite–taenite)
meteorite
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Silicon
Element Si
mineral
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)