Man Made Material (Jewelry, Metal Alloy)

Brick fragment (Man-made material)

N/A (Fired clay)

Obsidian

Volcanic Glass

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Gold

Aurum (Au)

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Amber Inlay Jewelry

Fossilized Resin (C10H16O)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Slag

Anthropogenic Vitrification Product / Silicate Slag

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Concrete

Hydrated Portland Cement Aggregate Composite

Red goldstone beads

Goldstone (man-made copper-bearing glass; not a natural mineral)

Copper Nugget

Native Copper (Cu)

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Crushed Stone (Likely Limestone or Granite)

Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite

Goldstone

Man-made glass with copper inclusions

Likely iron-rich slag or weathered ironstone fragment

Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag

Jade-and-cabochon fruit cocktail ring

Likely nephrite or jadeite (jade) leaves with orange/cream chalcedony or other cabochons; identification from the image is uncertain

Decorated turquoise-like bead or mineral pendant

Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper

Galena (lead sulfide)

Galena, PbS

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Concrete Fragment

Hardened Portland Cement Composite

Heart-shaped faceted gemstone pendant

Likely yellow quartz (citrine) or synthetic yellow stone, set in metal with small clear accent stones

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)

Polished yellow-green serpentine pendant

Serpentine-group minerals, chiefly antigorite and/or lizardite; approximate formula Mg3Si2O5(OH)4

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Diamond / Clear Quartz / Glass paste

Carbon (Diamond) / Silicon Dioxide (Quartz)

Opalite (likely imitation opal glass)

Man-made opalescent glass; not a natural mineral (often sold as opalite)

Ferrochrome Slag

Industrial Glassy Slag (Fe-Cr alloy byproduct)

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Concrete rubble

Anthropogenic conglomerate

Gold ring with a clear faceted gemstone

Likely diamond (crystalline carbon, C); identification is uncertain from the image

Faceted transparent gemstone pendant

Likely cubic zirconia (zirconium dioxide, ZrO₂); possibly diamond or synthetic moissanite

Faceted brown gemstone pendant, likely smoky quartz or champagne topaz

Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)

Aquamarine

Beryl (Be3Al2Si6O18)

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Faceted clear gemstone in a gold-tone ring, likely colorless glass or cubic zirconia

Undetermined; possible cubic zirconia (ZrO₂) or glass (amorphous SiO₂)

Turquoise cabochon ring

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O