Anthropogenic Mineral Mimic

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Peach Moonstone

Feldspar (KAlSi3O8) with inclusions

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Banded Sandstone

Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)

Serpentine

Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)

Chert with Manganese Dendrites / River Silt Overlays

Cryptocrystalline Quartz (SiO2) with Manganese Oxides

Opalite

Synthetic Opalised Glass

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Banded Agate (Mutton-fat or Pork-stone variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Lake Superior Agate

Silicon Dioxide (SiO2)

Turquoise (Likely Stabilized or Dyed Howlite/Magnesite)

CuAl6(PO4)4(OH)8·4H2O (if true turquoise), but likely dyed howlite Ca2B5SiO9(OH)5

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

Opalite

Synthetic Silicon Dioxide (SiO2)

Iron-rich meteorite (probable stony-iron or weathered iron meteorite)

Unclassified meteorite; likely Fe–Ni metal with silicate minerals

Dragon Vein Agate

Chalcedony (cryptocrystalline silica, SiO2) variety Agate

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Ferruginous Sandstone Pebble

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)

Banded Agate (specifically Botswana Agate appearance)

Silicon Dioxide (SiO2) - variety of Chalcedony

Vanadinite on calcite (likely)

Vanadinite, Pb5(VO4)3Cl, with calcite, CaCO3

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Sodium Polyacrylate (Superabsorbent Polymer)

Sodium Polyacrylate [-CH2-CH(COONa)-]n

Tiger's Eye and Carnelian Quartz

Silicon Dioxide (SiO2)

Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Dyed Magnesite (often sold as Red Turquoise or Howlite)

Magnesium Carbonate (MgCO3)

Concrete Fragment

Hardened Portland cement and mineral aggregate

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Vanadinite cluster

Vanadinite, Pb5(VO4)3Cl

Slag

Ferrous slag (by-product of iron smelting)

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

Zebra Jasper

Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Shell Cameo (Sardonyx Shell)

Cassis madagascariensis (Sardonyx shell)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Carnelian

Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO₂)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer