Opalite
Synthetic Opalised Glass
mineral
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Jewelry, Metal Alloy) in the encyclopedia
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Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Botryoidal chalcedony (likely agate/jasper variety)
Microcrystalline quartz, SiO₂
mineral
Libyan Desert Glass
Libyan Desert Glass (SiO2 with trace elements)
mineral (impactite)
Red-orange jasper pebble (tentative)
Microcrystalline quartz, SiO₂, colored mainly by iron oxides
mineral
Nickel–iron meteorite (likely weathered iron meteorite)
Fe–Ni alloy, chiefly kamacite and taenite
meteorite
Opalite
Synthetic Glass (Simulated Opal)
mineral
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Black onyx or black agate bead bracelet
Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate
gemstone
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Metallic iron meteorite (probable)
Iron meteorite, typically kamacite–taenite (Fe–Ni alloy)
meteorite
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Goldstone (likely red/brown aventurine glass)
Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)
mineral
Polished obsidian
Volcanic glass; predominantly rhyolitic SiO₂
igneous
Native Copper
Native Copper (Cu)
mineral
Pearl-and-gemstone insect brooch
Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image
gemstone
Native Copper
Native Copper (Cu)
mineral
Bismuth
Bismuth (Bi)
mineral
Carborundum
Silicon Carbide (SiC)
mineral
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Cherry Quartz
SiO2 (Silicon Dioxide with iron-rich inclusions/dye)
mineral
Gold Nugget
Native Gold (Au)
mineral
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Nickel
Nickel (Ni)
mineral
Opalite
Synthetic opalescent glass
glass
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Iridescent bismuth crystal
Bismuth (Bi), commonly laboratory-grown and oxidized
mineral
Possible iron meteorite
Iron–nickel meteorite, commonly kamacite-taenite (Fe-Ni alloy)
meteorite
Vesicular basalt (weathered scoria)
Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides
igneous
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Mounted faceted gemstone ring
Likely diamond (carbon, C), though the image is insufficient for definitive identification
gemstone
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Goldstone
Aventurine glass
mineral (man-made glass)