Man Made Alloy (Metallic)

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

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Likely tumbled red mineral or glass imitation

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

Likely polished copper-bearing stone or copper nugget

Uncertain from the image; possibly native copper (Cu) or copper-stained rock

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Tumbled milky quartz pebble

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

Polished opalite (likely man-made opalescent glass)

Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass

Iron Meteorite

Siderite (Meteoric Iron-Nickel alloy)

Gold (10K Alloy)

Aurum (Au) with alloying metals (Cu, Ag, Zn)

Sea Glass

Man-made vitreous material (silica-based glass)

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Chakra Stone Tower (Composite Multi-Mineral)

Crystalline Silicon Dioxide composite (SiO2) with various inclusions

Tumbled milky quartz

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

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Green Aventurine

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

Ironstone Concretion (Pot Stone)

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

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Sea Glass

Man-made silicate glass weathering product

Opalite

Synthetic Glass / Man-made Opal Simulant

Opalite

Synthetic Opalized Glass / Man-made Glass

Opalite

Man-made glass (traditionally simulated Opal)

Iron-Nickel Meteorite Fragment (Unclassified)

Iron-Nickel Alloy (Taenite and Kamacite)

Opalite-style glass pendant

Man-made opalescent glass (not natural opal)

Blue opalite glass cabochon (likely imitation opal)

Man-made opalescent glass; not a natural mineral

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Opalite

Man-made Opalized Glass (Synthetic Glass)

Green Sea Glass

Man-made vitreous material (silica glass)

Nickel

Nickel (Ni)

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Ocean Jasper Mushroom

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

Opalite

Synthetic Glass (SiO2 + impurities)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Iron Meteorite

Iron-Nickel Alloy (Kamacite and Taenite)

Concrete Fragment

Hardened Portland Cement Composite

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Pallasite Meteorite

Pallasite (ST-class)