Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
sedimentary
Category
Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Aventurine (likely Green Aventurine)
Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)
Mineral
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (often colloquially called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz / Quartz Geode fragment
Silicon Dioxide (SiO2)
mineral
Jadeite (Jade)
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
metamorphic
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Petrified Wood (Silicified Wood)
Silicified Wood / Silicon Dioxide (SiO2)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Rhodolite Garnet
Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)
igneous
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate hydroxide)
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Unakite
Unakite (altered granitic rock)
metamorphic
Quartz / Quartzite
Quartz (Silicon Dioxide, SiO2)
metamorphic
Blue Quartzite (Dyed)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Nephrite Jade
Nephrite (a variety of the Calcium magnesium iron silicate mineral series Actinolite), Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Greenstone (Rough Jadeite or Nephrite)
Sodium aluminum silicate (Jadeite) / Calcium magnesium iron silicate (Nephrite)
metamorphic
Burmese Jadeite (Water Jade)
Jadeite (NaAlSi2O6)
metamorphic
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
mineral
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Diorite (River Cobble)
Intrusive Igneous Diorite
igneous
Limonite Concretion (Ironstone)
Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with included minerals (Fuchsite for green)
Metamorphic Rock / Mineral (Quartz Variety)
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
igneous