Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Quartz on Matrix
Silicon Dioxide (SiO2)
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
Sandstone
Arenite (SiO2 primarily)
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Lapis Lazuli (Low Grade)
Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)
Granite
Granite
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
Sandstone
Arenite
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Arenite (Clastic Sedimentary Rock)
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Eclogite
Eclogite (Omphacite + Pyrope)
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
River Stone (Sandstone with Oxide Banding)
Arenite with Iron/Manganese Oxide inclusions
Sandstone
Arenite (SiO2 predominantly)
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
Sandstone
Arenite (SiO2 primarily)
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
Schist
Schist
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
Sandstone
Arenite (typically SiO2 based)
Sandstone/Quartzite
Sedimentary Rock (composed mainly of SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 principal)
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
Sandstone (Pebble)
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 dominant)
Sandstone
Arenite
Quartz Geode
Silicon Dioxide (SiO2)