Tumbled peacock ore (likely chalcopyrite)
Chalcopyrite, CuFeS₂, commonly artificially oxidized to produce iridescent colors
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Tumbled peacock ore (likely chalcopyrite)
Chalcopyrite, CuFeS₂, commonly artificially oxidized to produce iridescent colors
Amethyst crystal point
Quartz, purple variety — silicon dioxide (SiO₂)
Blue slag glass / industrial glass fragment
Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag
Smoky Quartz
Silicon Dioxide (SiO2)
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Black Onyx
Chalcedony (SiO2)
Fossil sea urchin (echinoid)
Fossilized echinoid test, likely a regular sea urchin (Class Echinoidea); exact genus and age require locality and examination
Iridescent bismuth crystal
Bismuth (Bi), commonly laboratory-grown and oxide-coated
Copper-bearing schist (likely bornite/chalcopyrite ore)
Micaceous schist with sulfide minerals, chiefly bornite (Cu₅FeS₄) and/or chalcopyrite (CuFeS₂)
Agate
Agate (a variety of Chalcedony, SiO2)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Bismuth
Bismuth (Bi)
Dyed or coated quartz geode
Quartz geode; silicon dioxide (SiO₂), likely artificially color-enhanced
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Peacock ore
Iridescent chalcopyrite, commonly bornite-coated or artificially treated copper sulfide
Rainbow aura quartz cluster
Quartz, silicon dioxide (SiO₂), artificially coated with a thin metallic film
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Peridot (likely, given the color and bead form)
Olivine, variety Peridot (Mg,Fe)2SiO4
Smoky Quartz
Quartz (SiO₂)
Smoky Quartz
SiO2 (Silicon Dioxide)
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
Pink-dyed tumbled stone, possibly quartz or agate
Unconfirmed; likely quartz (SiO₂) or microcrystalline quartz (chalcedony, SiO₂), artificially dyed
Tumbled pink quartz, likely dyed
Quartz (silicon dioxide, SiO₂), probably artificially colored chalcedony or milky quartz
Tumbled purple stone, likely amethyst-bearing quartzite or dyed quartz
Quartz (SiO₂), possibly microcrystalline quartzite; purple color may be from iron-related amethyst or artificial dye
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Turquoise cabochon
Turquoise; hydrated copper–aluminum phosphate, approximately CuAl6(PO4)4(OH)8·4H2O (composition varies)
Peacock ore (iridescent chalcopyrite, possibly bornite)
Chalcopyrite, CuFeS₂; the iridescent surface may be natural tarnish or artificial acid treatment. Similar material is bornite, Cu₅FeS₄.
Dyed blue howlite or magnesite cabochon
Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially dyed blue
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Tumbled blue stone, likely dyed howlite or magnesite
Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially blue-dyed
Dyed blue howlite or magnesite tumbled stone
Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially dyed blue
Tumbled purple stone, possibly lepidolite-bearing rock or dyed quartzite
Uncertain from image; possible quartz (SiO₂) with purple mica, or artificially dyed silicate
Peacock Ore
Bornite (Cu5FeS4)
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
Red Tiger's Eye beads
Tiger's Eye (variety of Chalcedony, SiO2)
Pearls
Aragonite (calcium carbonate) and Conchiolin
Yellow chalcedony or citrine-like polished stone
Chalcedony (microcrystalline quartz, SiO₂), possibly dyed or artificially illuminated; exact identification is uncertain from the image