Man Made Material (Metal)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Asphalt Concrete

Bituminous Concrete

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

White pebble, likely quartz or calcite

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

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Blue Goldstone

Man-made glass with suspended copper, cobalt, or manganese particles

Sea Glass

Amorphous Silicon Dioxide (SiO2)

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

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Green Sea Glass

Man-made vitreous material (silica glass)

Green Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

Sea Glass

Man-made vitreous material (silica glass)

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Blue Goldstone

Goldstone (artificial glass)

Brick fragment (Man-made material)

N/A (Fired clay)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Sea Glass

Man-made vitreous material (silica-based glass)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Concrete

Hydrated Portland Cement Aggregate Composite

Unidentifiable Rock Fragment

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Crushed Stone (Likely Limestone or Granite)

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

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Likely iron-rich slag or weathered ironstone fragment

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

Concrete Fragment

Hardened Portland Cement Composite

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Gem-set gold ring

Gold alloy setting with a colorless faceted gemstone, possibly quartz or glass; the stone cannot be identified reliably from the image

Asphalt (Bituminous Concrete)

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

Conglomerate

Conglomerate (clastic sedimentary rock)

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)