Man Made Object (Metal Alloy)

Bismuth crystal

Bismuth (Bi), artificially crystallized

White pebble, likely quartz or calcite

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

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Diamond

Native Carbon (C)

Conglomerate

Conglomerate (clastic sedimentary rock)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Iron meteorite (probable)

Fe–Ni alloy, mainly kamacite and taenite

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Blue Celestite

Celestine (Strontium Sulfate, SrSO4)

Celestine (Celestite)

Strontium sulfate (SrSO4)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Blue Goldstone

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

Mixed gemstone bead bracelet

Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

Concrete rubble

Anthropogenic conglomerate

Slag

Anthropogenic Vitrification Product / Silicate Slag

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

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

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Opalite (Synthetic Moonstone/Sea Opal)

Silicon Dioxide (SiO2) glass with metallic inclusions

Likely tumbled red mineral or glass imitation

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

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)

Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)

Ironstone Concretion (Pot Stone)

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)