Granite
Granite (Felsic Plutonic Rock)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Granite
Granite (Felsic Plutonic Rock)
Porphyritic Basalt
Basalt (with plagioclase phenocrysts)
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Pebble (Likely Basalt or Siltstone)
Clastic sedimentary rock or mafic volcanic rock
River cobble (Greywacke/Sandstone)
Sandstone / Greywacke
Possible tektite or iron-rich slag-like natural specimen
Uncertain; possibly natural glass (tektite) or magnetite-rich rock
Granite
Granite (Plutonic Igneous Rock)
Red Sandstone
Arenite (SiO2 with Fe2O3)
Gneiss
Gneiss
Agate
Silicon dioxide (Chalcedony), SiO2
Horn Coral Fossil
Rugosa (Tetracoralla)
Granite
Intrusive Igneous Rock
Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz Druzy
Silicon Dioxide (SiO2)
Hag Stone
Perforated sedimentary rock (typically flint, chert, or limestone)
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Granite
Felsic intrusive igneous rock
Granite
Intrusive Igneous Rock
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
Granite
Intrusive Igneous Rock
Granite
Phaneritic Felsic Intrusive Igneous Rock
Granite
Felsic intrusive igneous rock
Granite
Intrusive Igneous Rock (Felsic)
Granite
Phaneritic Felsic Igneous Rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Intrusive Igneous Rock
Granite Pebble
Intrusive Igneous Rock
Granite
Granite
Granite
Felsic intrusive igneous rock
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
Granite
Intrusive Igneous Rock
Granite
Intrusive igneous rock
Quartz geode
Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Vein in Siltstone
Siltstone with Quartz (SiO2) inclusion
Quartz Geode with Chalcedony
Silicon Dioxide (SiO2) in Geode Form
Quartz Geode
Silicon Dioxide (SiO2) within a geode
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Metaconglomerate
Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)