Synthetic (Man Made Glass)

Iron Slag (Industrial Byproduct)

Anthropogenic Vitrification Product/Ferrous Slag

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Libyan Desert Glass

Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)

Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate

Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

Slag

Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)

Slag (Industrial Glass/Glassy Rock)

Anthropogenic Vitreous Material

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Concrete / Anthropogenic Conglomerate

Man-made composite material (Portland cement, aggregate, and water)

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Diamond

Native Carbon (C)

Conglomerate

Conglomerate (clastic sedimentary rock)

Unidentified polished dark gemstone cabochon

Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Likely clear quartz crystal or glass-like gemstone

Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image

Aluminum Slag

Anthropogenic Aluminum (Al)

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Synthetic Marbled Aggregate (Footwear Component)

Ethylene-vinyl acetate (Croslite™)

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

Tumbled black obsidian (likely)

Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Blue cabochon gemstone, likely synthetic spinel or glass

Undetermined; possible synthetic cobalt-blue spinel (MgAl₂O₄) or colored glass

Concrete rubble

Anthropogenic conglomerate

Slag

Anthropogenic Vitreous Silica/Iron oxides

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Ironstone Concretion (Pot Stone)

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

Chakra Stone Tower (Composite Multi-Mineral)

Crystalline Silicon Dioxide composite (SiO2) with various inclusions

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral