Man Made Object (Simulant)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Opalite

Synthetic Opalite (Man-made glass)

Opalite

Man-made Glass (SiO2 + additives)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Transit Token (RTD Denver)

Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)

Diamond ring

Diamond, crystalline carbon (C)

Goldstone

Man-made glass with copper inclusions

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Green Sea Glass

Man-made silicate glass (weathered)

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

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Likely iron-rich slag or weathered ironstone fragment

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

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Asphalt (Road Aggregate)

Bituminous conglomerate

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

Crushed Stone (Likely Limestone or Granite)

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

Mystic Topaz (Treated Quartz or Topaz)

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating

Sandstone Concretion

Limonitic Sandstone Concretion

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Terrazzo (Man-made Composite)

Cementitious or Resin-bound Lithic Composite

Faceted clear gemstone in a gold-colored setting

Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Unidentifiable Rock Fragment

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Obsidian

Volcanic glass

Concrete

Anthropogenic Conglomerate

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Sea Glass

Man-made vitreous material / Silicon dioxide

Tumbled black stone, likely black obsidian

Obsidian; volcanic glass, typically rhyolitic composition (SiO₂-rich)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Diamond ring

Diamond (crystalline carbon, C) set in a metal ring; the small stones appear diamond-like but cannot be confirmed from the image.

Blue Diamond

Carbon with Boron impurities (C)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Goldstone

Auraventurine (Synthetic glass with cobalt and copper inclusions)

Opalite

Synthetic Glass (Silica-based)

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)