Man Made Object (Metal Alloy)

Opalite

Synthetic opalescent glass

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Aqua Aura Quartz

Silicon Dioxide (SiO2) bonded with Gold (Au)

Glass

Amorphous Silicon Dioxide (SiO2)

Goldstone

Aventurine glass

Iron meteorite (likely)

Fe–Ni metallic meteorite, commonly kamacite–taenite

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Bismuth Crystal

Bismuth (Bi)

Nickel–iron meteorite (likely weathered iron meteorite)

Fe–Ni alloy, chiefly kamacite and taenite

Beaded gemstone jewelry (likely amethyst, lapis lazuli, and pearl or glass imitation)

Mixed mineral beads; possible quartz (SiO₂) and lazurite-bearing lapis lazuli

Gold and Silver (Metal Components of an Antique Pocket Watch)

Native Gold (Au) and Native Silver (Ag)

Bismuth Crystal

Bismuth (element symbol Bi, atomic number 83)

Cherry Quartz

SiO2 (Silicon Dioxide with iron-rich inclusions/dye)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Green Slag

Anthropogenic Silicate Glass

Opalite

Synthetic Opalite Glass

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Hematite

Iron(III) oxide (Fe2O3)

Metallic iron meteorite (probable)

Iron meteorite, typically kamacite–taenite (Fe–Ni alloy)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Aquamarine (Small Beads)

Beryl (Be3Al2Si6O18 with traces of iron)

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

Likely iron meteorite fragment

Iron meteorite, probably kamacite–taenite (Fe–Ni alloy)

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Opalite

Synthetic Opalised Glass

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Likely iron meteorite

Iron meteorite, predominantly kamacite and taenite (Fe–Ni alloys)

Weathered metallic fragment, possibly iron meteorite or industrial slag

Uncertain; candidate iron meteorite (Fe–Ni alloy), but terrestrial slag or corroded metal is also plausible

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Boxwork or Septarian Concretion

Septarian nodule / Boxwork weathering

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)