Man Made Mineral Simulant (Glass)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Opalite (Man-made Glass)

Synthetic Opalised Glass

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Blue opalite glass (likely man-made)

Opalite glass; a silica-based amorphous glass, not natural opal

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Opalite

Synthetic Opalised Glass

Opalite

Man-made Glass (Synthetic Opalized Glass)

Tumbled opalite (likely man-made glass)

Opalite, a trade name for opalescent glass; not natural opal

Slag Glass

Vitreous Silicate Residue

Sea Glass

Man-made vitreous material (silica-based glass)

Green Sea Glass

Man-made vitreous material (silica glass)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite (Synthetic Moonstone/Sea Opal)

Silicon Dioxide (SiO2) glass with metallic inclusions

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Faceted colorless gemstone, likely cubic zirconia or quartz

Uncertain from photograph; cubic zirconia (ZrO₂) is the leading visual possibility, with quartz (SiO₂) as an alternative

White quartz pebble or chip

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Unidentified translucent crystal/mineral fragment

Likely quartz (SiO₂), but visual identification is uncertain

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Blue Obsidian

Volcanic Glass (Silica, SiO2)

Green sea glass (likely bottle glass)

Man-made soda–lime silicate glass; not a natural mineral

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2

Loose faceted colorless gemstones, likely quartz or glass-like mineral chips

Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Black tumbled stone, possibly obsidian

Obsidian (volcanic glass; predominantly SiO₂), identification uncertain from image

Clear quartz sphere

Quartz (silicon dioxide, SiO₂)

Terrazzo (Man-made Composite)

Cementitious or Resin-bound Lithic Composite

Blue-stone and diamond ring

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

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Asphalt Concrete

Bituminous conglomerate

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Tumbled gray stone, likely quartz-rich pebble

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

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Blue Diamond

Carbon with Boron impurities (C)

Blue Goldstone

Auraventurine (Synthetic glass with cobalt and copper inclusions)