Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Category
Meteorite
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Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)
sedimentary
Olivine
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Ferruginous Sandstone with Ironstone Concretion
Goethite-rich Sandstone (FeO(OH))
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate, (Mg,Fe)2SiO4
Mineral
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
mineral
Mixed collection of natural stones
Several unidentified lithologies, likely including basalt, granite, quartzite, sandstone, and weathered metamorphic rocks
igneous, metamorphic, sedimentary
Chert Nodule / Ironstone Concretion
Microcrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
igneous
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Slag (Industrial Glass/Byproduct)
Anthropogenic Vitreous Silicate
igneous (anthropogenic)
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Peridot (Olivine)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Moldavite
Silica glass with small amounts of aluminum, iron, and other elements
Mineraloid / Tektite
Iron-stained brecciated chert or jasper
Microcrystalline quartz (SiO₂), likely chert/jasper with iron-oxide staining
sedimentary
Ironstone (Limonite/Hematite concretion)
Ferruginous Siltstone / Goethite (FeO(OH))
sedimentary
Hardpan Nodule / Ferruginous Sandstone
Ferruginous Sandstone (Fe-cemented sediment)
sedimentary
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Hematite
Iron Oxide (Fe2O3)
mineral
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
sedimentary
Martian Basalt Rock
Extrusive Mafic Igneous Rock (Basalt)
igneous
Olivine (often within Peridotite)
Magnesium iron silicate, (Mg,Fe)2SiO4
mineral
Ironstone Concretion
Ferruginous Sandstone / Hematite-rich Concretion
sedimentary
Ironstone Concretion
Ferruginous Sandstone / Siderite Concretion
sedimentary
Slag (Industrial Glass)
Artificial Vitreous Silicate
mineraloid (anthropogenic)
Diamond
Native Carbon (C)
mineral
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
igneous
Ironstone Concretion / Limonite Node
Goethite and Limonite (FeO(OH) nH2O)
sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
mineral
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous