Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Man-made Glass (Tumbled/Shaped)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Man-made Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating/dye
Blue sea glass or blue glassy mineral fragment
Uncertain; likely man-made soda-lime glass, not a natural mineral
Blue glassy fragment among beach gravel
Likely cobalt-blue man-made glass; not a natural mineral specimen
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
Asphalt Pavement (with aggregate)
Asphalt concrete
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
Hematite Beads
Hematite (Fe2O3)
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Basalt
Basalt
Gabbro
Gabbro
Blue goldstone
Man-made aventurine glass containing metallic copper particles; not a natural mineral
Likely polished quartz or glass-like mineral cabochon
Probably quartz (SiO₂), though the image cannot exclude man-made glass
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
Slate
Metamorphic Pelitic Rock
Blue glassy mineral specimen, possibly dyed or synthetic
Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass
Lava Rock (Dyed)
Basalt / Volcanic scoria
Pumice
Pumice (Vitreous volcanic rock)
Diamond Druzy (Crystalline Diamond)
Carbon (C)
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Quartzite
Metamorphic Quartzite (SiO2)
Grey Chalcedony
Silicon Dioxide (SiO2)
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
Green Agate
Silicon dioxide (SiO₂)
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
Orange glassy slag (industrial by-product)
Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O