Gold Nugget
Native Gold (Au)
Category
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Gold Nugget
Native Gold (Au)
Vesicular Basalt (Scoria)
Basalt (Extrusive Igneous Rock)
Pyrite
Pyrite (FeS2)
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Bismuth Crystal
Bismuth (Bi)
Basalt (River Cobble)
Basalt (Mafic volcanic rock)
Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
Basalt (with possible quartz veinsing)
Basalt
Basalt
Basalt (Mafic volcanic rock)
Ferruginous Quartz (Hematoid Quartz)
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Native Copper
Native Copper (Cu)
Basalt with Calcite Veins
Basalt (containing CaCO3 inclusions)
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
Botryoidal Hematite (Iron Stone Conglomerate)
Hematite (Fe2O3) in sedimentary matrix
Nuummite
Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Pyrite
Iron Disulfide (FeS2)
Galena
Lead(II) sulfide (PbS)
River Quartzite (or Quartz Cobble)
Quartzite (primarily Silicon Dioxide - SiO2)
Limonite
FeO(OH)·nH2O (Hydrated iron oxide)
Iron Gossan (Limonite/Goethite)
Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Pyrite
Iron Disulfide (FeS2)
Pahoehoe Basalt
Extrusive mafic volcanic rock
Basalt (River-worn Pebble)
Aphanitic Mafic Igneous Rock
Hematite (Concretion)
Iron(III) oxide (Fe2O3)
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Gold-Bearing Quartz
Auriferous Quartz (SiO2 with native Au)
Basalt (Vesicular)
Basalt (Extrusive Volcanic Rock)
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
Galena
Lead(II) Sulfide (PbS)
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Orange Aventurine (Sunstone-style Quartzite)
Silicon Dioxide (SiO2) with Goethite or Hematite inclusions
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Slag (Industrial Glass/Metal Waste)
Artificial silicate/ferro-silicate byproduct
Pyrite
Iron Sulfide (FeS2)
Basalt (River Stone)
Basalt (Extrusive Igneous Rock)
Limonite and Goethite encrusted Chert/Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)