Magnetite (Iron Ore)
Magnetite (Fe3O4)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
Petrified Wood
Silicified wood (primarily quartz, SiO2)
Glauconite Siltstone
Glauconitic siltstone / K(Fe,Al,Mg)2[(Si,Al)4O10](OH)2
Pyrite
Iron Sulfide (FeS2)
Quartz
Silicon Dioxide (SiO2)
Basalt
Extrusive Igneous Rock
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Quartz Vein in Host Rock (often Granite or Schist)
Silicon Dioxide (SiO2) within host matrix
Green Fluorite
Calcium Fluoride (CaF2)
Milky Quartz
Silicon dioxide (SiO2)
Basalt
Basalt
Greenschist
Greenschist facies rock
Carnelian
Silicon Dioxide (Quartz variety, SiO2)
Malachite
Malachite, Cu2CO3(OH)2
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
Fluorite
Calcium Fluoride (CaF2)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Basalt (River Pebble)
Basalt (dominated by Plagioclase Feldspar and Pyroxene)
Granodiorite
Granodiorite (NaAlSi3O8 to CaAl2Si2O8 / SiO2)
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Chalcedony / Yellow Agate
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Polished black stone, likely black obsidian
Obsidian — volcanic glass, chiefly SiO₂
Apache Tear
Obsidian (Volcanic Glass)
Rhyolite
Rhyolite (felsic volcanic rock)
Granite
Phaneritic plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
Rhyolite
Rhyolite
Quartz fragment
Silicon Dioxide (SiO2)
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Rhodochrosite
Manganese Carbonate (MnCO3)
Malachite with Chrysocolla
Copper carbonate hydroxide (Cu2CO3(OH)2) and Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
Rose Quartz
Rose Quartz (SiO₂)
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Jasper
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert (Flint)
Cryptocrystalline Quartz (SiO2)