Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Siltstone
Siltstone (primarily SiO2, Al2O3)
Quartz (Common Quartz Pebble)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Jasper with Iron Staining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Milky Quartz
Silicon Dioxide (SiO2)
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
Chert (specifically Flint or Common Opal variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Yellow Quartzite Pebble
Quartzite (SiO2)
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
Chert (Red/Brown Variety)
Microcrystalline quartz (SiO2)
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
Chert
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Sandstone with Quartz Veins
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone
Arenite (primarily SiO2)
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcareous sedimentary rock (primarily CaCO3)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
Yellow Chert (Jasper)
Chalcedony (SiO2) with iron oxide inclusions
Sandstone (Ferruginous)
Arenite (complex silicate composition with iron oxides)
Sandstone
Arenite
Sandstone
Arenite (SiO2 primarily)
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
Sandstone
Arenite (SiO2 based)
Red Sandstone
Arenite (primarily Quartz with Iron Oxide)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
Jasper or Chalcedony
Microcrystalline Quartz (SiO2)
Kambaba Jasper
Stromatolite (Fossilized Algae)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Sandstone (River Pebble)
Arenite (SiO2 based)