Green iridescent glass cabochon or synthetic gemstone
Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone
Category
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
Green iridescent glass cabochon or synthetic gemstone
Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Opalite
Opalescent Glass (SiO2 + coloring agents)
Slag Glass / Industrial Slag
Anthropogenic Glass
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
Fordite
Anthropogenic paint-rock
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Flint (chert), likely a worked stone flake
Microcrystalline quartz (SiO₂); cryptocrystalline variety of quartz
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
Mystic Topaz (Treated Quartz or Topaz)
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating
Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
Green sea glass (likely)
Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
Opalite
Man-made Glass (SiO2 + additives)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
Blue glassy gemstone-like specimen
Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass
Opalite
Synthetic Opalite (Man-made glass)
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
Concrete-like aggregate surface with embedded rock fragments
Anthropogenic concrete or exposed aggregate; not a natural rock specimen
Bismuth Crystal
Bismuth (Bi)
Aura Rose Quartz
SiO2 (Silicon Dioxide with Titanium/Gold coating)
Likely iron-rich rock or weathered metallic mineral fragment
Uncertain; possibly limonite/goethite or iron-bearing slag
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
Likely polished quartz or glass-like mineral cabochon
Probably quartz (SiO₂), though the image cannot exclude man-made glass
Slag
Metallurgical Slag
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)