Basalt (River Pebble)
Extrusive mafic igneous rock
igneous
Category
Anthropic Metallic Specimen
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Hematite Concretion
Iron(III) oxide (Fe2O3)
mineral
Nuummite
Orthoamphibole (Gedrite-Anthophyllite series)
metamorphic
Specular Hematite
Hematite (Fe2O3)
mineral
Quartz with Schorl inclusions
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Placer Gold Nugget
Native Gold (Au)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Sunstone
Plagioclase feldspar (with Copper or Hematite inclusions)
mineral
Dendritic Agate (River Pebble)
Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions
mineral
Basalt
Basalt (Mafic Extrusive)
igneous
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Limonite (Ironstone Concretion)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
River Cobble (likely Basalt or Chert)
Basalt (Mafic volcanic rock)
igneous
Basalt
Mafic extrusive igneous rock
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Basalt pebble
Basalt
igneous
Basalt
Mafic volcanic rock
igneous
Silver (Native Silver)
Native Silver (Ag)
mineral
Pyrite-rich Gossan
Iron Sulfide (FeS2) in Ore Matrix
mineral
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz with Mica (Gneiss/Schist influence)
Silicon Dioxide (SiO2) with Phyllosilicates
igneous/metamorphic
Sunstone (Feldspar variety)
Oligoclase or Andesine (Na,Ca)(Al,Si)4O8
mineral
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
metamorphic
Muscovite Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Iron Meteorite (likely an Individual specimen)
Iron Meteorite (Group IAB, IIAB, IIIAB, etc., Fe-Ni alloy)
igneous
Pyrite (Iron Pyrite) with Goethite Oxidation
Iron Sulfide (FeS2)
mineral
Bornite
Cu5FeS4 (Copper Iron Sulfide)
mineral
Gold Ore
Native Gold (Au)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Chalcopyrite in Quartz (Gossan/Iron Hat)
CuFeS2 (Chalcopyrite) with SiO2 (Quartz)
mineral
Basalt
Mafic Igneous Rock
igneous