Tiger's Eye (often misinterpreted as Gold Ore in this context)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Category
Anthropic Metallic Specimen
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Likely serpentine and polished hematite
Serpentine-group minerals, commonly antigorite/lizardite; hematite, Fe₂O₃
mineral
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Polished septarian nodule
Septarian concretion; calcite/aragonite and barite-filled fractures in a carbonate-rich mudstone, commonly with pyrite
sedimentary
Peacock Ore (Bournite/Chalcopyrite)
Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sunstone
(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)
mineral
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Native Copper with Cuprite and Quartz
Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)
mineral
Gold
Native Gold (Au)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Specular hematite (likely with magnetite/goethite)
Hematite, Fe₂O₃; associated iron oxides may include magnetite, Fe₃O₄, and goethite, FeO(OH)
mineral
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (Green)
Calcium Fluoride (CaF2)
mineral
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Peacock Ore
Bornite (Cu5FeS4)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Tumbled metallic sulfide specimen, likely chalcopyrite
Chalcopyrite (CuFeS₂), possibly polished or coated
mineral
Gabbro (likely with Pyrite/Sulfide mineralization)
Mafic Intrusive Igneous Rock
igneous
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Galena-bearing ore (tentative)
Galena, lead sulfide (PbS), likely in a quartz/carbonate-rich matrix
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Micro-Meteorite (Micrometeoroid)
Extraterrestrial Spherule (Silicate or Iron-Nickel)
mineral
Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Smoky Quartz with Siderite and Pyrite
Silicon Dioxide (SiO2) with Ferrous Carbonate (FeCO3) and Iron Sulfide (FeS2)
mineral
Bixbyite on Rhyolite
Bixbyite (Mn2+,Fe3+)2O3
mineral
Tumbled polymetallic mineral specimen, likely chalcopyrite-bearing ore
Probable chalcopyrite (CuFeS₂) with quartz and iron-oxide minerals; exact identification is uncertain from the photograph
mineral
Botryoidal Hematite (Kidney Ore)
Iron(III) oxide (Fe2O3)
mineral
Iron Meteorite
Siderite (Meteoric Iron-Nickel alloy)
igneous
Bismuthinite with Chalcopyrite and Quartz
Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)
mineral
Magnetite or Ironstone Nodule
Magnetite (Fe3O4) or Hematite-rich Sedimentary Nodule
mineral