Hematite
Iron Oxide (Fe2O3)
mineral
Category
Sedimentary Or Igneous (Secondary Formation)
Browse sedimentary or igneous (secondary formation) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Igneous (Secondary Formation) in the encyclopedia
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Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
mineral
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Vanadinite on Barite
Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)
mineral
Yellow Sapphire
Corundum (Al2O3)
gemstone
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Quartz with Iron Stains
Silicon Dioxide (SiO2) with FeOx inclusions
mineral
Copper Ore
Cupriferous Rock / Mixed Mineral Matrix
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
mineral
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Bornite
Bornite (Cu5FeS4)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Diorite
Diorite (Intrusive igneous rock)
igneous
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Amygdaloidal Basalt with Quartz
Basalt with Secondary Mineral Infilling
igneous
Vesicular Basalt
Basalt with secondary mineral infills
igneous
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Chrysocolla on Quartz
Chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O) often associated with Quartz (SiO2)
mineral
Iron Meteorite (likely Chondrite or Iron-Nickel fragment)
Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy
igneous
Meteorite (Chondrite)
Chondritic Meteorite (Undifferentiated extraterrestrial rock)
igneous
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Prehnite with Epidote inclusions
Prehnite: Ca2Al(AlSi3O10)(OH)2; Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Turquoise (Tumbled/Polished)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Greenstone
Metabasalt / Greenschist
metamorphic
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Uncertain small pale mineral fragment
Indeterminate; possibly calcite or a light-colored feldspar fragment
mineral
Orange Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral