Sedimentary (Man Made)

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Sandstone Concretion

Siliciclastic Concretion

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Ironstone Concretion (Pot Stone)

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

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Obsidian

Volcanic Glass

Blue Obsidian

Volcanic Glass (Amorphous)

Diamond (or Simulant)

Carbon (C)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Blue Goldstone

Man-made glass infused with copper crystals

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Weathered iron-rich concretion or ironstone nodule

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

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

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)

Painted River Rock

Artificially Coated Sedimentary Rock

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)

Small black stone fragment (possibly obsidian)

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

Obsidian

Volcanic Glass

Dyed Agate

Chalcedony (SiO2)

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

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.)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)