Anthropogenic Specimen (Man Made Material)

Slag

Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Not a rock, mineral, or geological specimen

Goldstone

Aventurine Glass (Man-made)

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Unidentifiable Rock Fragment

Glass

Amorphous Silicon Dioxide (SiO2)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Blue Goldstone

Aventurine Glass

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Industrial Slag

Anthropogenic Vitreous Slag

Beads (likely glass or man-made material)

N/A (artificial material)

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Asphalt (Road Aggregate)

Bituminous conglomerate

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Asphalt Concrete

Bituminous conglomerate

Chert Arrowhead (Lithic Tool)

Microcrystalline quartz (SiO2) - Archeological lithic artifact

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Diamond / Clear Quartz / Glass paste

Carbon (Diamond) / Silicon Dioxide (Quartz)

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Blue Goldstone

Auraventurine (Synthetic glass with cobalt and copper inclusions)