Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
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Blue slag-like mineral specimen, possibly bornite or chalcopyrite
Tentatively bornite (Cu5FeS4) or iridescent chalcopyrite (CuFeS2)
mineral
Green Quartz (Prasiolite or Aventurine)
Silicon Dioxide (SiO2)
mineral
Quartzite (Lithic Artifact)
Quartzite (SiO2)
metamorphic
Chert (specifically a Lithic Flake)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Likely iron-rich slag or weathered ironstone
Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag
mineral
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
mineral
Milky Quartz or Calcite Pebble
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Sulfur
Native Sulfur (S)
mineral
Sulfur (with Matrix)
Native Sulfur (S8)
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Silver Nuggets (Natural or Cast)
Native Silver (Ag)
mineral
Arsenopyrite with Schist Matrix
Arsenopyrite (FeAsS)
mineral
Tiffany Stone
Fluoritized Opal Beryllium Tuff (composed of Fluorite; CaF2, Opalized SiO2, Bertrandite, Chalcedony, and Quartz)
metamorphic
Likely iron-rich rock or weathered metallic mineral fragment
Uncertain; possibly limonite/goethite or iron-bearing slag
mineral
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Silver (Sterling Silver Jewelry)
Argentum (Ag) mixed with Copper (Cu)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Calcite
Calcium Carbonate (CaCO3)
mineral
Weathered metallic sulfide ore, likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz–iron-oxide host
mineral
Pyrite (on Quartz matrix)
Iron Disulfide (FeS2)
mineral
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Possible meteorite fragment
Undetermined; likely an iron-rich meteorite or meteorite-like slag fragment
meteorite
Queen Conch Shell (Biogenic Calcium Carbonate)
Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
Likely metallic meteorite fragment
Undetermined; possibly an iron meteorite or stony-iron meteorite
meteorite
Orange glassy slag (industrial by-product)
Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Carved pyrite frog or toad
Pyrite (iron disulfide, FeS₂), likely a carved massive aggregate
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
The user-provided image does not contain a rock or mineral specimen
N/A
N/A (Non-Geological Object)
N/A
Diamond (or Diamond Simulant)
C (Carbon) or synthetic equivalent
gemstone
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock