Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
Sandstone
Quartzose Sandstone (Sedimentary Rock)
Geode with Quartz and possibly Jasper/Hematite
Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides
Sandstone
Arenite (primarily SiO2)
Sandstone
Sedimentary Rock (Quartz/Feldspar grains cemented together)
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
Sandstone (with Iron Staining)
Arenite
Petrified Wood
Silicified wood (primarily quartz, SiO2)
River Stone (Sedimentary Sandstone/Quartzite)
Arenite/Quartzite transition specimen
Banded Sandstone Peabble
Arenite with iron oxide banding
Sandstone
Arenite
Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
Sandstone
Arenite
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
Sandstone
Arenite (primarily SiO2)
Fossil Shell (Bivalve)
Class Bivalvia (fossilized)
Sandstone
Arenite
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
Fossilized Brachiopod
Brachiopoda (Phylum)
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
Sandstone
Sedimentary Rock (Quartz Arenite)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
Conglomerate
Conglomerate (clastic sedimentary rock)
Travertine (Tufa)
Chemical Sedimentary Rock (CaCO3)
Conglomerate
Conglomerate (clastic sedimentary rock)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Sedimentary rock composed mainly of quartz sand
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Mixed rough mineral specimens, likely quartz-bearing rocks
Probable quartz (SiO₂), with possible feldspar, iron oxides, and altered host rock
Sandstone Pebble
Arenite (SiO2 based)
Sandstone or Mudstone
Sedimentary Rock
Milky quartz
Quartz, silicon dioxide (SiO₂)
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Quartzose)
Arenite (SiO2 based typically)
Red Jasper (or Banded Jasper)
Silicon Dioxide (SiO2 with Hematite impurities)