Limonite (Iron Ore)
Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O
mineral
Category
Man Made Alloy (Metallic)
Browse man made alloy (metallic) specimens identified by the Rock Identifier community.
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Sunstone
Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Pyrite in Matrix (Quartz/Schist)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Basalt River Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (likely Fluorite on Quartz/Matrix)
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Basalt (Vesicular/Scoriaceous)
Extrusive Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)
Igneous
Nuummite
Nuummite (mixture of Anthophyllite and Gedrite)
metamorphic
Limonite after Pyrite (Pseudomorph)
FeO(OH)·nH2O following FeS2
mineral
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Hematite
Hematite (Fe2O3)
mineral
Specular Hematite
Hematite (Iron Oxide, Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Turquoise color-bead and Hematite necklace
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Gold
Native Gold (Au)
mineral
Basalt River Cobble
Basalt (Mafic Igneous Rock)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Basalt
Basalt (composition of Plagioclase feldspar and Pyroxene)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Moqui Marbles
Iron Oxide Concretion (Hematite/Goethite)
sedimentary
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Gold Nugget
Native Gold (Au)
mineral
Basalt
Basalt (composition predominately Plagioclase feldspar and Pyroxene)
igneous
Ironstone Concretion (Boji Stone/Moqui Marble type)
Goethite/Hematite-encrusted Sandstone Concretion
sedimentary
Gold
Native Gold (Au)
mineral
Vesicular Basalt (River Rock)
Afanitic Vesicular Basalt
igneous
Vesicular Basalt
Extrusive Basalt (Mafic Silicate)
igneous
Banded Iron Formation (Jaspilite)
Banded Iron Formation (BIF); predominantly Hematite (Fe2O3) and Magnetite (Fe3O4) with Chert/Jasper (SiO2)
sedimentary
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Ironstone Concretion (Moqui Marble type)
Iron oxide concretion (Goethite/Hematite and Sandstone)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Gold
Native Gold (Au)
mineral