Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Red Sandstone
Arenite (with Iron Oxide)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
Biotite Schist with Garnet
Garnet-Biotite Schist
Common Opal
Hydrated amorphous form of silica (SiO2·nH2O)
Sandstone (Quartzose Pebble)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
Sandstone with Quartz Veining
Clastic sedimentary rock (SiO2 dominated)
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
Sandstone Pebble
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
Gneiss
Gneiss
Gneiss
High-grade regional metamorphic rock (Foliated)
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
Green Calcite
Calcite (CaCO3)
Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
Quartz (Small Grains)
Silicon Dioxide (SiO2)
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sandstone
Arenite (Secondary classification based on grain size)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Sandstone
Arenite (primarily SiO2)
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)