Iron Slag
Anthropogenic Iron oxide/Silicate composite
Mineral-like byproduct (Technogenic)
Category
Mineraloid (Anthropogenic)
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Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Crackled Quartz (Blue Dyed)
Silicon Dioxide (SiO2) with anthropogenic dye
mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Green sea glass (likely bottle glass)
Human-processed soda–lime silicate glass; not a natural mineral or rock
mineral
Small dark mineral/rock fragment
Indeterminate; possibly magnetite-bearing basalt or iron-rich slag
mineral
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Sea Glass
Amorphous Silica (Anthropogenic glass) - SiO2
mineral
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Iron-rich concretion or slag-like mineral fragment
Likely limonite/goethite (FeO(OH)·nH₂O), possibly magnetite-bearing material
mineral
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Chert (Arrowhead or Flake)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
mineral
Chert (Arrowhead artifact)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Sea Glass
Man-made silicate glass
sedimentary
Mahogany Obsidian
Volcanic glass (high silica) with inclusions of Magnetite or Hematite
igneous
Obsidian
Volcanic glass (SiO2 + impurities)
igneous
Anthracite Coal
Anthracite (Carbon-rich mineraloid)
metamorphic
Amber
Succinite (Organic Mineraloid) - C10H16O
mineral
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral