Petrified Wood
Silicified Wood (SiO2)
sedimentary
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Fossilized Shark Tooth
Fossil Chondrichthyes (various genera such as Carcharias or Odontaspis)
sedimentary
Granite Pegmatite with Muscovite Mica
Granite Pegmatite (Silicon Dioxide and complex silicates)
igneous
Greenstone / Greenstone Pebble
Greenschist (metamorphosed basalt or gabbro)
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Granite (Pink/Red Orthoclase variety)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Red Sandstone
Arenite (Iron-rich)
sedimentary
Tiger's Eye (Jasper-like Chalcedony)
Silicon dioxide (SiO2) - Pseudomorph after Crocidolite
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Greenstone
Greenschist (Greened Metabasalt)
metamorphic
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
metamorphic
Sandstone (Quartzose Sandstone)
Sandstone (SiO2 with various trace minerals)
sedimentary
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Green Chalcedony
Silicon Dioxide (SiO2) with trace minerals
mineral
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Limonite Concretion (Ironstone)
Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)
sedimentary
Limonite (vibrant yellowish-brown iron oxide)
Limonite (FeO(OH)·nH2O)
mineral
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Diorite (River Pebble)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous
Gneiss
Gneissic Metamorphic Rock
metamorphic
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral