Man Made Mineral Simulant (Glass)

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Opalite

Man-made glass (traditionally simulated Opal)

Opalite

Synthetic Glass (Simulated Opal)

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Not a rock, mineral, or geological specimen

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Beads (likely glass or man-made material)

N/A (artificial material)

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Goldstone

Aventurine glass

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Colorless faceted gemstone (likely glass or cubic zirconia)

Likely cubic zirconia, ZrO₂; exact identification is uncertain from the photograph

Glass

Amorphous Silicon Dioxide (SiO2)

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Opalite

Synthetic Opalized Glass

Opalite

Synthetic Glass (Simulated Opal)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Opalite

Synthetic Silicon Dioxide (SiO2)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

White quartz pebble

Quartz (SiO₂), likely milky quartz

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Opalite (Man-made Glass)

Synthetic Opalised Glass

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Opalite

Synthetic Glass (Silica-based)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Tumbled quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Opalite

Man-made Glass (SiO2 + additives)

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

Green Sea Glass

Man-made silicate glass (weathered)

Slag Glass

Vitreous Silicate Residue

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

White quartz pebble or chip

Quartz (silicon dioxide, SiO₂), possibly milky quartz