Small greenish crystal/mineral fragment
Indeterminate; possibly olivine, quartz, or a green gemstone fragment
Category
Browse antropogenic (man made) specimens identified by the Rock Identifier community.
Small greenish crystal/mineral fragment
Indeterminate; possibly olivine, quartz, or a green gemstone fragment
Dalmatian jasper
Porphyritic microcrystalline quartz-rich rock, commonly sold as Dalmatian jasper; spots are chiefly arfvedsonite/amphibole minerals, sometimes altered feldspar
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Opalite
Synthetic opalescent glass
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
Glass
Amorphous Silicon Dioxide (SiO2)
Goldstone
Aventurine glass
Green glass-like mineral specimen, likely fluorite
Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass
Opalite (likely man-made opalescent glass)
Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)
Brick fragment (Man-made material)
N/A (Fired clay)
Opalite
Synthetic Opalised Glass
Opalite (Man-made Glass)
Synthetic Opalised Glass
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
Opalite
Synthetic Opalite Glass
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Red Sandstone or Brick Fragment
Arenite (if sandstone)
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
Polished labradorite sphere
Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)
Polished labradorite pendant
Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Hematite
Iron(III) oxide (Fe2O3)
Cherry Quartz
SiO2 (Silicon Dioxide with iron-rich inclusions/dye)
Likely clear quartz pebble or glassy quartz fragment
Quartz (silicon dioxide, SiO₂)
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Green Slag
Anthropogenic Silicate Glass
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Sea Glass
Man-made vitreous material (silica-based glass)
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)