Man Made Composite

Sea Glass

Man-made vitreous material (silica-based glass)

Sea Glass

Man-made vitreous material (silica glass)

Goldstone

Man-made glass infused with metallic copper

Opalite

Man-made Glass (Synthetic Opalized Glass)

Sea Glass

Man-made silicate glass weathering product

Opalite

Synthetic Glass / Man-made Opal Simulant

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Opalite

Synthetic Opalized Glass / Man-made Glass

Opalite

Man-made glass (traditionally simulated Opal)

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Tumbled milky quartz pebble

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

Goldstone

Man-made glass infused with copper crystals

Blue Sandstone

Man-made glass with cobalt and copper inclusions

Goldstone

Man-made glass containing cuprous oxide

Goldstone

Man-made glass infused with copper particles

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)

Terrazzo (Synthetic Composite Rock)

Cementitious or Epoxy Resin-bound Aggregates

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Blue Goldstone

Aventurine Glass

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)

Porcelain (White Ceramic)

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

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Ocean Jasper Mushroom

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

Opalite

Synthetic Glass (SiO2 + impurities)

Opalite

Synthetic Glass (typically Silica/Magnesium based with metal additives)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Slag

Anthropogenic glassy silicate