Man Made Material (Simulant

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Diamond (or Simulant)

Carbon (C)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Opalite

Synthetic Glass / Man-made Opal Simulant

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Cullet Glass / Slag Glass

Amorphous silica glass

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

N/A - Non-Geological Item

Opalite

Synthetic glass / Opalized glass

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Metal Chain Belt with Square Plates

Not applicable (man-made)

Opalite (likely man-made glass)

Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives

Sea Glass

Man-made vitreous material

Sea Glass

Man-made vitreous material

Turquoise-colored bead necklace (likely dyed howlite or magnesite)

Likely dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue-stone and diamond ring

Blue stone is possibly blue sapphire (corundum, Al₂O₃); surrounding stones appear to be diamonds (carbon, C).

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant

Goldstone

Aventurine Glass (Man-made)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Diamond (likely) in an antique gold ring

Diamond, crystalline carbon (C)

Opalite

Synthetic glass / Simulated opal

Blue crystal pendant (likely blue glass or synthetic crystal)

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

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Ring with an Orange Inlay

N/A (Man-made object)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Not a geological specimen

N/A (man-made object)

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Diamond (or Diamond Simulant)

Carbon (C)

Concrete Fragment

Hardened Portland cement and mineral aggregate

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Concrete

Anthropogenic Conglomerate