Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Mineral
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
Learn about Mineral Description (Anthropogenic Material) in the encyclopedia
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Iron-Stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Limonite coating
mineral
Quartz Pebble with Epidote / Chlorite Inclusions
Silicon Dioxide (SiO2) with Epidote/Chlorite inclusions
mineral
Arfvedsonite with Garnet
Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2
igneous
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
fossil
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Sandstone
Clastic sedimentary rock (Quartz arenite / Arkose)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (chlorite schist)
metamorphic
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Tree Agate
Silicon dioxide (SiO2)
Mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Botryoidal iron-rich jasper
Ferruginous jasper/chalcedony, primarily microcrystalline quartz (SiO₂) with iron oxides and hydroxides
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 with various cementing minerals)
sedimentary
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Mineraloid (Industrial byproduct)
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Likely weathered quartz-rich rock fragment
Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock
igneous
Tiger's Eye
Silicon Dioxide (Quartz with crocidolite inclusions), SiO2
gemstone
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone)
Silicified limestone or banded sedimentary rock with mineral veins
sedimentary
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Fossil Snail
Gastropoda (fossilized)
fossil
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Limonite
Limonite (FeOO·nH2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)