Man Made Material (Metal)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Gemstone bead necklace (likely citrine or yellow quartz)

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

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring

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

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Diamond (in Jewelry Setting)

Carbon (C)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Diamond

Native Carbon (C)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

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 Obsidian

Volcanic Glass (SiO2 with inclusions)

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Industrial Slag

Anthropogenic Vitreous Slag

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

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

Tumbled milky quartz pebble

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

Faceted transparent gemstone pendant

Uncertain from image; likely faceted quartz (SiO₂), cubic zirconia (ZrO₂), or glass imitation

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)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Gold (Elemental Metal)

Gold (Au)

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)