Anthropogenic (Man Made Material Processed By Nature)

Diamond

Native Carbon (C)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Iron Slag

Anthropogenic Iron Silicate

Coquina

Biogenic Limestone (Calcite, CaCO3)

Red-orange cabochon, likely carnelian or glass imitation

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

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Vesicular basalt (weathered scoria)

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

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Polished black stone, likely obsidian

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

Green Agate

Silicon dioxide (SiO₂)

Limestone

Calcareous sedimentary rock (CaCO3)

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Ironstone Concretion (Pot Stone)

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

Green sea glass (likely bottle glass)

Man-made soda–lime silicate glass; not a natural mineral

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Milky quartz

Quartz (silicon dioxide, SiO₂)

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Slag (Industrial)

N/A (Anthropogenic Slag)

Angel Aura Quartz (Treated Clear Quartz)

Silicon Dioxide (SiO2) coated with Vaporized Silver and Platinum

Opalite

Synthetic Glass (SiO2 + impurities)

Coquina

Bioclastic Limestone

Small rounded mineral pebble, possibly quartz

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

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Tumbled milky quartz pebble

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

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)

Eroded Brick or Pumice-like Scoria

Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Gemstone jewelry ensemble

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

Tumbled milky quartz

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

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Green Aventurine

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

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Coquina

Biogenic Limestone (Calcite/Aragonite base, CaCO3)