Man Made Material (Metal)

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Black onyx or black agate bead bracelet

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

Amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Jade-and-cabochon fruit cocktail ring

Likely nephrite or jadeite (jade) leaves with orange/cream chalcedony or other cabochons; identification from the image is uncertain

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Faceted clear gemstone in a gold-tone ring, likely colorless glass or cubic zirconia

Undetermined; possible cubic zirconia (ZrO₂) or glass (amorphous SiO₂)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Opalite

Synthetic Glass (Simulated Opal)

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Blue Obsidian

Volcanic Glass (Silica, SiO2)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Likely smoky quartz pendant

Smoky quartz, silicon dioxide (SiO₂), quartz variety colored by irradiation-related defects

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Carborundum

Silicon Carbide (SiC)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

Green cabochon gemstone, likely nephrite jade

Nephrite jade—interlocking amphibole fibers, chiefly tremolite-actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Opalite

Man-made Glass (Synthetic Opalized Glass)

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Diamond

Carbon (C)