Sandstone Concretion
Limonitic Sandstone Concretion
sedimentary
Category
Anthropogenic (Man Made Industrial Deposit)
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
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Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
not a rock or mineral
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
Anthropogenic (Man-made artifact)
Metallic sulfide mineral fragment, likely galena
Galena (lead sulfide, PbS), tentative identification
mineral
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Nutting Stone / Cupstone (Sandstone or Quartzite)
Sedimentary rock with anthropogenic modification (cupule)
sedimentary
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
mineral
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Opalite
Synthetic Glass (Silica-based)
gemstone
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
mineral
Iron Slag
Anthropogenic Iron Silicate
industrial byproduct
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Slag (Industrial Glassy Byproduct)
Anthropogenic silicate byproduct (Slag)
Mineral-like byproduct (often mistaken for igneous rock or meteorite)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Iron Slag
Anthropogenic pyrometallurgical residue
industrial byproduct
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
mineral
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
igneous
Opalite
Synthetic Opalized Glass
gemstone
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Chert / Flint Handaxe
Cryptocrystalline Quartz (SiO2)
sedimentary
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Iron Slag
Anthropogenic Vitreous Ferrous Silicate
industrial byproduct (anthropogenic)
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary