Man Made (Synthetic Rock)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Concrete

Anthropogenic Conglomerate

Concrete Fragment

Hardened Portland cement and mineral aggregate

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Terrazzo (Man-made Composite)

Cementitious or Resin-bound Lithic Composite

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

Metal Chain Belt with Square Plates

Not applicable (man-made)

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

White pebble, likely quartz or calcite

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

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Cullet Glass / Slag Glass

Amorphous silica glass

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Concrete rubble

Anthropogenic conglomerate

Concrete / Anthropogenic Conglomerate

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

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Concrete fragment with Aggregate

Anthropogenic Concrete with Calcarious and Siliceous Aggregate

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Slag

Anthropogenic Vitreous Silica/Iron oxides

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Slag

Glassy silicate byproduct (anthropogenic material)