Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
Category
Browse mineral like byproduct specimens identified by the Rock Identifier community.
Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
Amygdaloidal Basalt with Quartz Infill
Amygdaloidal Basalt (SiO2 infill)
Limonite Concretion
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite or Magnetite inclusions)
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
Petrified Wood
Silicified Wood (SiO2)
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
Diorite
Diorite
Sandstone (Banded)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 principal composition)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Diorite
Diorite (Intrusive igneous rock)
Fossilized Coprolite
Coprolite (fossilized feces)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Limonite (Gossan)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
Jasper
Silicon dioxide (SiO2)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Limonite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
Obsidian
Amorphous volcanic glass (70-75% SiO2)
Limonite
FeO(OH)·n(H2O)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Chrysocolla
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)
Copper Ore (with Malachite and Azurite)
Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)