Banded Agate (specifically Carnelian Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Category
Mineral, Specifically An Iron Ore
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Red Jasper (Brecciated or Mottled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Quartz (specifically Clear Quartz with iron/hematite staining)
Silicon Dioxide (SiO2)
mineral
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary
Banded Iron Formation / Jasper-Hematite Ore
Banded Iron Formation (BIF) containing Jasper (SiO2) and Hematite (Fe2O3)
sedimentary
Slag Glass
Amorphous Silica / Glass Slag
industrial byproduct (anthropogenic rock-like material)
Chrysocolla in Matrix
Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Ferruginous Sandstone
Arenite with Hematite/Limonite cement
sedimentary
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Banded Iron Formation (BIF) / Jasper-Magnetite
Banded Iron Formation (majorly Fe2O3/Fe3O4 + SiO2)
sedimentary
Basalt (River Pebble)
Mafic volcanic rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Sandstone (specifically Double Arch in Arches National Park)
Entrada Sandstone
sedimentary
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Banded Iron Formation (Jaspillite)
Banded Iron Formation (BIF) / Jaspillite
sedimentary
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions
sedimentary
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
African Turquoise
Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Chalcedony (specifically Common Opal or Agate variant)
Silicon Dioxide (SiO2)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite-Hematite-Chert)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Yellow Aventurine
Quartzite with inclusions (SiO2)
metamorphic
Chert (Yellow Jasper)
Silicon Dioxide (SiO2)
sedimentary
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Industrial byproduct (often confused with igneous rocks or meteorites)
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Jasper (specifically Red Jasper or Iron-stained Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
igneous
Bornite
Bornite (Cu5FeS4)
mineral
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct