Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
mineraloid (man-made)
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Man Made Origin) in the encyclopedia
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Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
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)
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Blue Crackle Quartz (Dyed Quarzite)
Silicon Dioxide (SiO2) with artificial dye
Metamorphic (modified)
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Diamond
Native Carbon (C)
mineral
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Carborundum
Silicon Carbide (SiC)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Synthetic Glass
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
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)
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
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)
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral