Basalt Pebble
Basalt (Mafic Igneous Rock)
Category
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Basalt Pebble
Basalt (Mafic Igneous Rock)
Bornite
Cu5FeS4 (Copper Iron Sulfide)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Pyrite
Iron Sulfide (FeS2)
Greenstone with Pyrite inclusions
Greenschist / Meta-volcanic rock with Iron Disulfide (FeS2)
Milky Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2)
Hematite
Hematite (Fe2O3)
Basalt
Basalt (Extrusive Mafic Igneous)
Rounded iron-rich pebble
Likely hematite/goethite-bearing quartzite or ironstone; exact identification requires testing
Hematite
Hematite (Fe2O3)
Native Copper
Copper (Cu)
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
Hematite
Iron Oxide (Fe2O3)
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Pyrite
Iron Sulfide (FeS2)
Quartz Pebble (with Manganese dendrites/staining)
Silicon Dioxide (SiO2) with Manganese Oxide impurities
Hematite
Iron(III) oxide (Fe2O3)
Pyrite in Shale
Iron Sulfide (FeS2)
Granite
Intrusive Igneous Rock
Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite treated with acid
Peacock Ore
Bornite (Cu5FeS4)
Labradorite (Larvikite variety)
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
Basalt with Iron Oxides
Mafic Igneous Rock (Mafite)
Peacock Ore
Bornite (Cu5FeS4)
Goethite pseudomorph after Pyrite
Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)
Goldstone (Brown)
Aventurine glass
Limonite Pseudomorph after Pyrite
Limonite (Hydrous iron oxides e.g., FeO(OH)·nH2O) pseudomorphing Pyrite (FeS2)
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions
Limonite Concretion (Goonie or Rattlestone)
Limonite (FeO(OH)·nH2O)
Hematite Concretion
Iron oxide (Fe2O3) in concretionary form
Iron Ore (Goethite and Hematite)
Iron Oxyhydroxide (α-FeO(OH)) and Iron(III) oxide (Fe2O3)
Ironstone Nodules (Limonite/Hematite)
Goethite/Hematite mix (FeO(OH)/Fe2O3)
Chalcopyrite in River Pebble (Pebble with Pyrite/Fool's Gold inclusions)
CuFeS2 in fine-grained igneous host rock (Basalt / Andesite)
Schist
Mica Schist
Raw galena specimen
Galena (lead sulfide, PbS)
Pyrite
Iron Sulfide (FeS2)
Tumbled sodalite (probable)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli
Pyrite and Calcite (or Barite) Specimen
Iron Sulfide (FeS2) with Calcium Carbonate (CaCO3)
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8