Anthropogenic Sedimentary (Man Made)

Weathered iron-rich concretion or ironstone nodule

Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Blue opalescent glass-like gemstone (possibly imitation opalite)

Likely man-made opalite glass; composition varies, typically silica-based glass

Sea Glass

Silicon dioxide (mostly)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Aura Quartz Geodes (Lab-Altered)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Slag

Anthropogenic Vitrification Product / Silicate Slag

Small black stone fragment (possibly obsidian)

Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)

Obsidian

Volcanic Glass

Dyed Agate

Chalcedony (SiO2)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

Asphalt concrete

Anthropogenic conglomerate

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica

Brick fragment (Man-made material)

N/A (Fired clay)

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Unidentified translucent crystal/mineral fragment

Likely quartz (SiO₂), but visual identification is uncertain

Goldstone

Man-made glass with copper inclusions

Sandstone Concretion

Septarian or Carbonate-cemented Sandstone Concretion

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Porcelain Tile (Sandstone-look)

Man-made Ceramic (resembling Quartz-rich Sandstone)

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Sandstone Anvil / Nutting Stone

Quartzose Sandstone (Sedimentary Rock)

Opalite

Synthetic Opalite Glass / Opalized Glass

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Green Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

Opalite

Synthetic Opalite (Man-made glass)

Opalite

Man-made Glass (SiO2 + additives)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass