Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with Iron Oxides
Category
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with Iron Oxides
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Sandstone
Clastic Sedimentary Rock (primarily SiO2)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Banded Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
Chert (Jasper/Quartzite variety)
Microcrystalline Silica (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (Flint nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Geode (Calcite or Quartz)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geode
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Diamond
Diamond (C)
Conglomerate
Conglomerate (Clastic sedimentary rock)
Sandstone
Arenite (composed primarily of SiO2)
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
Quartzite
Quartzite (primarily SiO2)
Limonite (Iron Ore)
Limonite (Hydrated iron oxide - FeO(OH)·nH2O)
Diamond
C (Native Carbon)
Shale
Fissile mudstone (rich in clay minerals and quartz)
Petrified Wood
Silicified Wood (primarily SiO2)
Chert (Flint)
Chert (̑SiO2)
Sandstone
Arenite
White Marble
Recrystallized Calcite (CaCO3)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Schorl (Black Tourmaline) in Pegmatite
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
Quartz
Silicon Dioxide (SiO2)
Quartz (Small Grains)
Silicon Dioxide (SiO2)
Gneiss
Gneiss
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Sandstone
Arenite (SiO2 based)
Rutilated Quartz
SiO2 with TiO2 inclusions (Quartz with Rutile)
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
Shale (Ferruginous)
Laminated Mudrock (Siliciclastic Sedimentary Rock)