Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate) specimens identified by the Rock Identifier community.
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
Likely chert/flint fragment
Microcrystalline quartz (SiO₂), possibly partially weathered chert
Seashell Fragment
Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite
Chert
Microcrystalline quartz (SiO2)
Fossil Coral
Tabulate Coral (potentially Favosites or Calapoecia)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
Chert (or Flint)
Microcrystalline Quartz (SiO2)
Pebble
Lithic fragment / Weathered rock fragment
Chert (Field Stone)
Silicon Dioxide (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
Chert (Green Chert)
Microcrystalline silica (SiO2)
Quartz-rich sandstone or chert fragment
Indeterminate siliciclastic rock; likely quartz arenite or weathered chert
Chert (Jasper)
Microcrystalline Quartz (SiO2) with Iron Oxide impurities
Chert (specifically a flint nodule component)
Microcrystalline quartz (SiO2)
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (Jasper/Quartzite Pebble)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Chert (SiO2)
Chert with Jasper/Quartz Inclusions
Silicon Dioxide (SiO2)
Chert (River Siltstone/Quartzite type)
Microcrystalline Quartz (SiO2)
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Red Sandstone
Arenite (SiO2 with Fe2O3)
Green Chert
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Polished/Tumbled)
Silicon Dioxide (SiO2)
Chert / Flint Jasper
Microcrystalline Quartz (SiO2)
Chert Pebble
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Cherty Flint/Jasper variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Chert (Red Jasper variant)
Microcrystalline Quartz (SiO2)
Chert Pebble (River Siltstone / Jasper)
Microcrystalline Quartz (SiO2)
River-worn Chert
Microcrystalline Quartz (SiO2)
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
Chert (Hagstone/Adder Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (specifically tan/pink variety)
Silicon Dioxide (SiO2)