Coarse Sand or Fine Gravel
Clastic Sediment (unconsolidated)
Category
Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.
Coarse Sand or Fine Gravel
Clastic Sediment (unconsolidated)
Sandstone (Ferruginous)
Arenite (Fe-bearing Clastic Sedimentary Rock)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone
Arenite (CaCO3/SiO2 cemented quartz)
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide cement Fe2O3)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Clastic sedimentary rock
Sandstone
Arenite (SiO2 based with various mineral cements)
Red Sandstone
Arenite (SiO2 with Iron Oxide impurities)
Red Sandstone
Arenite (with Iron Oxide cement)
Quartzite with Differential Weathering
Quartzite (SiO2)
Quartzite with inclusions
Quartzite (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 predominantly)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone Clast
Arenite (primarily SiO2)
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
Shale with Trace Fossils
Fissile mudrock (Shale)
Quartzite
Quartzite (composed primarily of SiO2)
Sandstone
Arenite
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Agate
Chalcendony (Silicon Dioxide, SiO2)
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
Sandstone (Red/Brown)
Arenite (composed primarily of SiO2)
Red Sandstone
Arenite (with Iron Oxide)
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
Pyrite
Iron Pyrite (FeS2)
Ferruginous Sandstone
Arenite with Hematite/Limonite cement (SiO2 + Fe2O3)
Sandstone (with Lichen)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Yellow Chalcedony / Carnelian
Silicon Dioxide (SiO2)
Sandstone
Sandstone (SiO2 dominated)
Sandstone (Ferruginous)
Clastic sedimentary rock (SiO2 with Fe2O3)
Sandstone
Arenite (primarily SiO2)
Red Sandstone
Arenite (SiO2 with Fe2O3)