Anthropogenic (Man Made Material Processed By Nature)

Iron Slag

Anthropogenic Iron Silicate

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Polished black stone, likely black obsidian

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

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Purple glassy pebble, possibly slag glass

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

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

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Opalite Egg

Synthetic Glass (Simulated Opal)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Slag Glass (Cullet)

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

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Diamond

Native Carbon (C)

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Red-orange cabochon, likely carnelian or glass imitation

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

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Coquina

Biogenic Limestone (Calcite, CaCO3)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Green sea glass (likely bottle glass)

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

Slag

Anthropogenic silicate slag

Slag (Industrial)

N/A (Anthropogenic Slag)

Blue sea glass or blue glassy mineral fragment

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

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

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Black beaded bracelet, likely black onyx or glass

Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass

Limestone

Calcareous sedimentary rock (CaCO3)

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification