Quartz Geode
Silicon Dioxide (SiO2)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Felsic gneiss, likely granitic gneiss
Quartz–feldspar–mica gneiss; commonly quartz + plagioclase/K-feldspar + biotite or hornblende
Sandstone
Clastic sedimentary rock (Quartz arenite)
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
Sandstone
Sedimentary Rock (Quartzose Sandstone)
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone
Arenite
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
Sandstone
Arenite (SiO2 based)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Sandstone
Arenite (SiO2 primarily)
Red jasper
Jasper, an opaque microcrystalline quartz variety (SiO₂), colored mainly by iron oxides
Sandstone Pebble
Arenite (primarily SiO2)
Sandstone
Arenite
Polished fossil gastropod shell
Fossilized gastropod (snail) shell; exact taxon cannot be determined from the image
Sandstone (with Chert/Quartzite nodules)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (SiO2 principal)
Sandstone
Arenite (SiO2 based)
Jasper with Quartz
Silicon dioxide (SiO2)
Sandstone
Arenite (SiO2 principal)
Banded Sandstone / Siltstone
Sedimentary Rock (Quartzose Sandstone / Siltstone)
Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)
Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole
Sandstone
Arenite (SiO2 based clastic rock)
White Chalcedony
Silicon Dioxide (SiO2)
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Chert
Silicon dioxide (SiO2)
Quartz Vein in Sandstone
Quartz (SiO2) in Clastic Sedimentary Rock
Sandstone Pebble
Arenite (SiO2 dominated with iron oxide)
Sandstone
Arenite (SiO2 based)
Banded Sandstone
Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)
Banded River Rock with Quartz Vein
Siltstone/Greywacke with Quartz (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
Sandstone
Clastic sedimentary rock (Quartz arenite)
Sandstone
Sandstone (Quartz-rich sedimentary rock)