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
Category
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
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
Dyed Agate
Chalcedony (SiO2)
Sea Glass
Man-made silicate glass
Faceted clear gemstone ring, likely quartz or glass imitation
Unidentified colorless faceted material; quartz (SiO₂) is possible, but the image cannot distinguish it from glass or another gem
Rock crystal (clear quartz), possibly cloudy quartz
Quartz, silicon dioxide (SiO₂)
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
Aura Rose Quartz
SiO2 (Silicon Dioxide with Titanium/Gold coating)
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Opalite
Synthetic Opalised Glass
Tumbled black obsidian (likely)
Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)
Concrete fragment or Conglomerate
Artificial Conglomerate (Concrete) or Natural Conglomerate
Red-orange cabochon, likely carnelian or glass imitation
Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Brick fragment (Man-made material)
N/A (Fired clay)
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
Blue Goldstone
Aventurine Glass
Quartz crystal fragment (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
Sea Glass
Man-made vitreous material / Silicon dioxide
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Polished white chalcedony or quartz pendant
Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image
Orange glassy slag (industrial by-product)
Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate
Tumbled milky quartz
Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
Blue opal heart cabochon
Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Beaded gemstone bracelet
Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
Sea Glass
Man-made vitreous material