Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
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Blue opalite glass cabochon (likely imitation opal)
Man-made opalescent glass; not a natural mineral
gemstone
Goldstone
Man-made glass infused with copper particles
gemstone
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Blue Goldstone
Man-made glass with cobalt and metal flecks
man-made glass
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
mineraloid
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Goldstone
Man-made glass with copper inclusions
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
mineraloid / anthropogenic
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
mineral
Opalite glass sphere (likely synthetic imitation)
Man-made opalescent glass; not natural opal
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Goldstone
Man-made glass infused with copper crystals
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Milky quartz (likely rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Opalite (Synthetic Moonstone/Opal)
Synthetic Silica Glass
mineraloid (synthetic)
Obsidian
Volcanic glass
igneous
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
mineral
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Opalite
Synthetic Glass (Simulated Opal)
mineral
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Tumbled white chalcedony (likely milky quartz)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Not a rock, mineral, or geological specimen
N/A
Opalite (likely imitation opal glass)
Man-made opalescent glass; not a natural mineral (often sold as opalite)
mineral
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Obsidian
Volcanic Glass
igneous
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Opalite
Synthetic Opalized Glass
gemstone
Clear quartz crystal (likely)
Quartz, silicon dioxide (SiO₂)
mineral