Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Category
Sedimentary Rock (Cryptocrystalline Quartz)
Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert / Flint (with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Chert (specifically Yellow or Brown Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Chert (often called Flint in this variation)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Yellow Chalcedony or River Jasper
Silicon Dioxide (SiO2)
sedimentary
Quartz (Clear / Rock Crystal)
Silicon Dioxide (SiO2)
Mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Chert (often referred to as Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline context of Quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Chert (within Limestone)
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
sedimentary
Chert (White Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Chert (specifically Flint or Jasper variant)
Microcrystalline silica (SiO2)
sedimentary
Chert (Brecciated or Veined)
Silicon Dioxide (SiO2)
sedimentary
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
sedimentary
Sandstone (with vugs)
Arenite / Sedimentary Sandstone
sedimentary
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
mineral
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
sedimentary
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
sedimentary
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
River Rock (Quartzite/Chert conglomerate)
Quartzite (SiO2)
metamorphic
Orbicular Jasper (Ocean Jasper tendency)
Silicon Dioxide (SiO2) with impurities
sedimentary