Man Made Material

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Not a rock, mineral, or geological specimen

Opalite

Synthetic glass / Opaque silicious glass

Transit Token (RTD Denver)

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

Glass

Amorphous Silicon Dioxide (SiO2)

Blue Goldstone

Aventurine Glass

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Opalite

Man-made opalescent glass

Opalite

Man-made opalized glass

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Sea Glass

Man-made silicate glass

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Aura Quartz (Rainbow Quartz)

Silicon Dioxide (SiO2) with metallic vapor coatings

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Blue glassy gemstone cabochon, likely dyed chalcedony or glass

Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Ferrous Slag

Iron/Steel Slag (Complex Calcium-Alumino-Silicates)

Sea Glass

Man-made vitreous material (silica-based glass)

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Diamond (or Simulant)

Carbon (C)

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Cultured Marble (Synthetic)

Polymer-matrix composite (typically calcium carbonate in polyester resin)

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Sea Glass

Silicon dioxide (mostly)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Painted River Rock

Artificially Coated Sedimentary Rock

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Asphalt Chunk

Asphalt concrete