Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
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Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Blue slag glass / industrial smelter slag
Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases
mineral
Likely weathered iron-rich rock or slag fragment
Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)
mineral
Quartz (Milky/River Quartz)
Silicon Dioxide (SiO2)
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Green Slag Glass
Amorphous Silicon Dioxide (with metallic impurities)
Igneous (Anthropogenic)
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Chert (often called Flint in archaeological contexts)
Microcrystalline or cryptocrystalline Silica (SiO2)
sedimentary
Tiffany Stone
Bertrandite-Bearing Fluorite Hyalite Opal
metamorphic
Bismuth
Bismuth (Bi)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Silver (Native Element)
Ag (Argentum)
mineral
Ambergris
Ambra grisea (Metabolic byproduct)
Organic (Geological relative)
Coal
Carbonaceous sedimentary rock
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Chalcanthite
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Gold
Native Gold (Au)
mineral
Iron Slag
Anthropogenic Ferro-silicate
mineral
Tiffany Stone
Bertrandite (with Fluorite, Opal, and Chalcedony), Be4Si2O7(OH)2
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sulfur
Native Sulfur (S)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Smelter Slag
Anthropogenic Silicate Slag
igneous
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Chert (specifically a Lithic Flake)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Bismuth
Bismuth (element Bi) with oxidized thin-film interference layer
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Green Quartz (Prasiolite or Aventurine)
Silicon Dioxide (SiO2)
mineral
Quartzite (Lithic Artifact)
Quartzite (SiO2)
metamorphic
Silver Nuggets (Natural or Cast)
Native Silver (Ag)
mineral
Milky Quartz or Calcite Pebble
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Sulfur
Native Sulfur (S)
mineral