Basalt
Extrusive mafic igneous rock
Category
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Basalt
Extrusive mafic igneous rock
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca, Na)(Al, Si)4O8
Lapis Lazuli
Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Banded Iron Formation (BIF) / Jasper-Magnetite
Banded Iron Formation (majorly Fe2O3/Fe3O4 + SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Mica Schist
Mica Schist (Intermediate-grade Metamorphic Rock)
Chondrite Meteorite
Ordinary Chondrite (L or H type)
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
Mica schist
Mica schist (Muscovite and Biotite group)
Basalt
Basalt (Extrusive Mafic Igneous)
Hematite (Iron Ore)
Hematite (Fe2O3)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Obsidian (specifically Rainbow or Silver Sheen Obsidian)
Volcanic Glass (predominantly SiO2)
Gold Nugget
Native Gold (Au)
Peacock Ore
Bornite (Cu5FeS4)
Limonite (also known as Yellow Ochre or Brown Hematite)
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
Mica Schist
Mica Schist
Vesicular Basalt
Mafic Igneous Rock
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Cuprite
Cuprite (Copper(I) oxide, Cu2O)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite)
Schist (Micaceous Schist)
Mica Schist
Ironstone Concretion / Limonite Node
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O) with Goethite/Hematite
Nuummite
Orthorhombic amphibole (Gedrite and Anthophyllite mixture) - (Mg,Fe)7Si8O22(OH)2
Anthracite Coal
Anthracite (Metamorphosed Coal)
Basalt
Basalt (extrusive volcanic mafic rock)
Meteorite (Chondrite)
L6 Ordinary Chondrite
Basalt
Mafic Igneous Rock
Mica Schist
Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)
Indigo Gabbro (also known as Mystic Merlinite)
Gabbro (composed of Plagioclase Feldspar, Pyroxene, and minor Magnetite/Ilmenite)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Hematite
Hematite (Fe2O3)
Banded Iron Formation (BIF) / Jasper
Banded Iron Formation (SiO2 with Fe2O3 and Fe3O4)