Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Category
Mineral, Specifically An Iron Ore
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Red Jasper (Oolitic Hematite)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
mineral
Limonite (Gozzany Iron)
Limonite (FeO(OH)·nH2O)
mineral
Yellow Ochre / Limonite
FeO(OH)·nH2O (Hydrated Iron Oxide Mix)
mineral
Magnetite (potentially Lodestone)
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Green Sandstone
Glauconitic Sandstone
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
sedimentary
Amethyst (Chevron Amethyst)
Amethystine Quartz (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)
mineral
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Limonite Concretion
Limonite (Hydrated iron oxide) FeO(OH)·nH2O
sedimentary
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Quartz with Pyrite
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Iron-rich river pebble
Goethite/hematite-bearing, weathered silicate rock (exact identification requires testing)
mineral
Likely weathered brown rock or iron-rich mineral specimen
Indeterminate from image; possible limonite/goethite-rich material
mineral
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Iron-rich breccia (hematite–goethite rock)
Hematite (Fe₂O₃) and goethite (FeO(OH)) ironstone, likely ferruginous breccia
sedimentary
Chalcedony on Ironstone
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeOOH)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Ironstone concretion (probable hematite–goethite-rich ironstone)
Iron oxide/hydroxide concretion; chiefly hematite (Fe₂O₃) and goethite (FeO(OH)), with possible magnetite and quartz
sedimentary
Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Likely hematite-rich iron ore or magnetite-bearing stone
Hematite (Fe₂O₃), possibly mixed with magnetite (Fe₃O₄) and silicate gangue
mineral
Brown Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Carnelian
SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony
mineral
Magnetite / Hematite (Iron Ore Pebble)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Green Jasper
Jasper (variety of Microcrystalline Quartz, SiO2)
sedimentary
Ironstone Pebble
Sedimentary Ironstone (Hematite/Limonite-bearing)
sedimentary
Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)
Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates
igneous, sedimentary, and metamorphic
Raw Citrine (Yellow Quartz)
Citrine / Silicon Dioxide (SiO2)
mineral