Magnetite (or Magnetic Iron Ore)
Magnetite (Fe3O4)
Category
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
Magnetite (or Magnetic Iron Ore)
Magnetite (Fe3O4)
Rough Sapphire
Corundum (Al2O3)
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Chalcedony Geode / Agate Nodule
Cryptocrystalline Quartz (SiO2)
Diamond
Diamond (C)
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Quartz Pebble
Silicon Dioxide (SiO2)
Parti Sapphire
Corundum (Al2O3)
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
Agate
Silicon Dioxide (SiO2)
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Peridot
Olivine ((Mg, Fe)2SiO4)
Quartz (Variety: Citrine or Tumbled Chalcedony)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
Chert (specifically Flint or Novaculite variant)
Chert (Microcrystalline Quartz, SiO2)
Rough Diamond
Native Carbon (C)
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
Aragonite Star Cluster
Aragonite (Sputnik habit) - CaesarCO3
Pegmatite
Granitic Pegmatite
Quartz (Beach Pebble)
Silicon Dioxide (SiO2)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO₂)
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
Schist
Mica Schist
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
River Pebble (Likely Quartzite or Chalcedony)
Silicon Dioxide (SiO2) - granular metamorphic variety
Diamond
Native Carbon (C)
Chalcedony (Botryoidal/Drusy Quartz)
Silicon Dioxide (SiO₂)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)