Man Made Material (Jewelry, Metal Alloy)

Likely blue-green glassy slag or a weathered mineral fragment

Unidentified; the image does not show diagnostic features sufficient for a mineral identification

Diamond

Carbon (C)

Diamond (in Jewelry Setting)

Carbon (C)

Copper Ore

Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)

Goldstone (Brown)

Aventurine Glass (Silicon Dioxide infused with Copper crystals)

Dark green cabochon gemstone ring

Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem

Small stud earring with a purple gemstone (possibly amethyst)

Possible amethyst, a purple variety of quartz (SiO₂); identification is uncertain from the image

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Goldstone (likely red/brown aventurine glass)

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

Mixed gemstone bead bracelet

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

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Obsidian

Volcanic Glass

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Dyed Agate

Chalcedony (SiO2)

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

White quartz pebble or chip

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Unidentified translucent crystal/mineral fragment

Likely quartz (SiO₂), but visual identification is uncertain

Tumbled milky chalcedony (likely common opalite-like quartz)

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

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Opalite

Synthetic Opalised Glass

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Polished white chalcedony or quartz pendant

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Industrial Slag

Anthropogenic Vitreous Slag

Black onyx or black agate bead bracelet

Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Nickel–iron meteorite (likely weathered iron meteorite)

Fe–Ni alloy, chiefly kamacite and taenite

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Metallic iron meteorite (probable)

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

Bismuth Crystal

Bismuth (Bi)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Iron Meteorite

Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Opalite

Synthetic Glass (Simulated Opal)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)