Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Category
Industrial By Product
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Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Iron Slag
Ferrous Slag (Industrial Byproduct)
mineraloid (anthropogenic byproduct)
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Mineral
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Faceted red ruby
Corundum (Al₂O₃), colored red by chromium
gemstone
Silicon
Element Si
mineral
Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Mineral
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Diamond
C (Carbon)
gemstone
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Man-made byproduct (Non-geological)
Mica schist (likely biotite–muscovite schist)
Mica schist; chiefly quartz and mica minerals (muscovite KAl₂(AlSi₃O₁₀)(OH)₂ and/or biotite)
metamorphic
Unidentified metallic mineral or meteorite fragment
Indeterminate; possible native metal-bearing sulfide or iron meteorite fragment
mineral
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Native Copper in Matrix
Native Copper (Cu)
mineral
Pegmatite
Igneous Pegmatite
igneous
Slag Glass
Silicon dioxide with impurities
mineral
Silicon
Silicon (Si)
mineral
Silver Flakes in Glass
Silver (Ag)
mineral
Red garnet cabochon pendant
Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.
gemstone
Iron-stained weathered rock
Unknown
Unknown (likely sedimentary or metamorphic)
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Quartzite
Quartzite
metamorphic
Concretion
Sedimentary Concretion
sedimentary
Goethite
Goethite (α-FeO(OH))
Mineral
Quartzite
Quartzite (mostly SiO2)
Metamorphic
Banded Iron Formation (BIF)
Banded Iron Formation (predominantly Hematite and Chert)
sedimentary
Coal
Bituminous coal (Complex organic sedimentary rock)
sedimentary
Ferrochrome Slag
Calcium-Aluminium-Magnesium Silicate Slag
industrial byproduct
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Weathered quartz-bearing rock, possibly calcite vein fragment
Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)
mineral
Pale green glassy mineral fragment, possibly prehnite or fluorite
Probable prehnite (Ca₂Al₂Si₃O₁₀(OH)₂) or pale-green fluorite (CaF₂); exact identification requires testing
mineral
Rose quartz bead bracelet
Quartz, SiO₂ (rose quartz variety)
gemstone
Diamond
Native Carbon (C)
mineral
Sulfur on Aragonite
Sulfur (S) and Aragonite (CaCO3)
Mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Crushed Stone Ballast
Crushed Limestone or Granite Aggregate
sedimentary