Sandstone
Arenite
sedimentary
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
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Greenschist (or Serpentinite) with Quartz-Feldspar Vein
Metabasalt / Greenschist Facies Rock
metamorphic
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium and Vanadium impurities)
mineral
Smoky Quartz with Chert
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 secondary)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (SiO ₂)
Mineral
Quartzite
Quartzite (primarily SiO₂)
metamorphic
Sandstone (Ferruginous Concretion)
Arenite (with iron oxide cement)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Sunstone
Heliolite (Aventurine Feldspar, (Ca,Na)((Al,Si)2Si2O8))
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sandstone (Ferruginous)
Arenite (SiO2 with Fe-oxide cement)
sedimentary
Rhodochrosite in Quartz
Manganese Carbonate (MnCO3)
mineral
Sandstone
Arenite (lithic or quartz sandstone)
sedimentary
Moqui Marble (Iron Oxide Concretion)
Iron Oxide Concretion (primarily Limonite/Hematite around a Sandstone center)
sedimentary
Polished serpentine pendulum
Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (SiO2 and varied Silicates)
metamorphic
Quartz (Milky or Rough Variety)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
Sandstone Concretion
Clastic Sedimentary Concretion (SiO2 with Iron Oxide)
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
White Marble
Recrystallized Calcite / Calcium Carbonate (CaCO3)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone Concretion
Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)
sedimentary
Obsidian
Volcanic Glass
igneous
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Sandstone Concretion
Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)
sedimentary
Quartz Vein in Pelite (Metamorphic Rock)
Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)
metamorphic
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
igneous
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Likely weathered gray-green stone, possibly serpentinite
Serpentinite (predominantly serpentine-group minerals; identification uncertain from image)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic