Chert / Flint
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Chert / Flint
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (primarily SiO2)
Jasper (specifically a banded or dark variety)
Silicon Dioxide (SiO2) with impurities
Chert (White/Gray variety)
Chert (SiO2)
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
Fossilized Bone Fragment
Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)
Chert (Jasper/Iron-stained Quartzite)
Silicon Dioxide (SiO2)
Banded Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Novaculite Variety)
Microcrystalline Quartz (SiO2)
Oolite or Oolitic Limestone
Oolitic Limestone (Principal mineral: Calcite, CaCO3)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
Chert
Chert (SiO2)
Pyrite
Pyrite (FeS2)
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
Shale
Argillaceous Rock
Sandstone (Micaceous/Feldspathic variant)
Arenite (specifically subarkose or lithic arenite)
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
Sandstone
Arenite
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
Green Jasper
Silicon Dioxide (SiO2) with impurities
Limestone (Weathered)
Calcium Carbonate (CaCO3)
Sandstone (Red Sandstone)
Arenite (SiO2 based with Fe2O3 staining)
Calcite
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
Chert / Flint Nodules in Sandstone
Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
Banded Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
Siltstone with flute casts or scratch marks
Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)
Sandstone Pebble with Iron Staining
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
Coquina / Limonite-stained Limestone
Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)
Hag Stone
Calcareous sedimentary rock (often Chert, Flint, or Limestone)
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
Marble
Recrystallized Calcite (CaCO3)