Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
sedimentary
Category
Meteorite (Extraterrestrial Material)
Browse meteorite (extraterrestrial material) specimens identified by the Rock Identifier community.
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Slag (Industrial Glassy Byproduct)
Ferro-silicate Slag
Anthropogenic / Non-Natural
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Iron-stained brecciated chert or jasper
Microcrystalline quartz (SiO₂), likely chert/jasper with iron-oxide staining
sedimentary
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Slag (Industrial Glass)
Artificial Vitreous Silicate
mineraloid (anthropogenic)
Olivine
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Diamond
Native Carbon (C)
mineral
Olivine
(Mg, Fe)2SiO4
Mineral
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
igneous
Mixed collection of natural stones
Several unidentified lithologies, likely including basalt, granite, quartzite, sandstone, and weathered metamorphic rocks
igneous, metamorphic, sedimentary
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
Mineral
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
mineral
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt
igneous
Olivine (Peridot in gem form)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Ferrochrome Slag
Industrial Glassy Slag (Fe-Cr alloy byproduct)
Antropogenic (Man-made industrial byproduct)
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Iron-rich chert or weathered ironstone
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides, possibly hematite/goethite
sedimentary
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Carborundum
Silicon Carbide (SiC)
mineral
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Iron Slag
Ferrous Slag (complex silicate and oxide byproduct)
industrial byproduct (anthropogenic)
Peridot gemstone pendant
Olivine, gem-quality forsteritic olivine (approximately (Mg,Fe)₂SiO₄)
gemstone