Tektite (Natural Glass)

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Obsidian

Volcanic Glass

Obsidian-like volcanic glass (likely slag or natural obsidian)

Obsidian, primarily amorphous volcanic silica glass (approximately SiO₂); identification is uncertain from an image

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

Libyan Desert Glass

Libyan Desert Glass (Impactite)

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Sandstone

Arenite

Chipped Glass/Plastic Fragment

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

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Tumbled opalite (likely man-made glass)

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

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Amethyst and Citrine (Ametrine Mix)

Silicon Dioxide (SiO2) with Fe3+ impurities

Raw Citrine Quartz

Silicon Dioxide (SiO2)

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Sandstone (with vugs or solution cavities)

Arenite (primarily Quartz and Feldspar with CaCO3 or SiO2 cement)

Ruby (Faceted)

Corundum (Al2O3:Cr)

Citrine Quartz

Silicon Dioxide (SiO2)

Tumbled blue glass-like specimen, possibly dyed chalcedony or synthetic glass

Uncertain; possible dyed quartz/chalcedony (SiO₂), but appearance strongly suggests cobalt-blue glass

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Sandstone

Sandstone (clastic sedimentary rock)

Pink corundum (likely synthetic or treated sapphire)

Corundum, Al₂O₃; pink coloration commonly from chromium or treatment

Pink/red faceted gemstone, likely synthetic corundum or glass imitation

Corundum (Al₂O₃), ruby/sapphire variety; exact identification requires testing

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

Possible tumbled obsidian

Volcanic glass, primarily rhyolitic silica glass (SiO₂-rich)

Sandstone

Arenite (Clastic Sedimentary Rock)

Prasiolite

Silicon Dioxide (SiO2) with iron impurities

Diamond (or Cubic Zirconia)

Carbon (C) / Cubic Zirconium Dioxide (ZrO2)

Green cabochon gemstone, likely glass-filled or synthetic emerald imitation

Uncertain; possible synthetic emerald (beryl, Be₃Al₂Si₆O₁₈) or green glass

Opalite

Man-made glass (traditionally simulated Opal)

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Small blue cut gemstone, possibly synthetic spinel or glass; species cannot be determined from the photo

Undetermined; blue synthetic spinel (MgAl₂O₄) is one possibility

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Green aventurine pebble

Quartz (SiO₂) with fuchsite mica inclusions

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Small colored gemstone or glass cabochons (uncertain)

Not identifiable from the image; the pieces may be colored glass or synthetic stones rather than natural minerals.

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions (SiO2)

Opalite

Synthetic Opalised Glass

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Citrine Quartz

Silicon Dioxide (SiO2)