Goldstone
Aventurine glass
mineral (man-made glass)
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
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Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Opalite
Synthetic glass / Opalized glass
gemstone
N/A - Non-Geological Item
not a rock/mineral
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Opalite
Synthetic glass (SiO2 + impurities)
mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Opalite
Man-made opalized glass
mineral
Goldstone
Aventurine Glass (Man-made)
mineral
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Sea Glass
Silicon dioxide (mostly)
mineral
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Sea Glass
Man-made vitreous material
mineral
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalite (Man-made glass)
mineral
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)
igneous
Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Blue glassy gemstone-like specimen
Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass
gemstone
Sea Glass
Man-made silicate glass
sedimentary
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Sea Glass
Man-made silicate glass
gemstone
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Opalite
Man-made opalescent glass
gemstone
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
mineraloid
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
mineral
Tumbled milky quartz
Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible
mineral
Not a geological specimen
N/A (man-made object)
N/A
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Quartz crystal fragment (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Aventurine Glass
man-made glass
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety
mineral