Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Nodule)

Cryptocrystalline Quartz (SiO2)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limonite-stained Chert

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Chert (with Desert Varnish/Iron Stain)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper based on color)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint) Nodule

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

Ferruginous Quartzite (Chert)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Chert (Tan/Grey)

Chert (Silicon Dioxide, SiO2)

Chert (Golden/Yellow Variety)

Microcrystalline Silica (SiO2)

Chert / Pink Flint

Cryptocrystalline Quartz (SiO2)

Jasper (Red Chert)

Jasper (Silicon Dioxide, SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Tree Agate

Silicon Dioxide (SiO2) with dendritic inclusions

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert / Flint

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Light Grey / Flint variant)

Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Jasper/Iron-stained Quartzite)

Silicon Dioxide (SiO2)

Quartz Vein with Host Rock (Greywacke/Siltstone)

Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix

Jasper or Chert with Quartz Vugs

Silicon Dioxide (SiO2)

Chert (variant Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (containing Flint nodules)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Yellow or Tan variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Conglomerate with Quartzite Pebbles

Clastic sedimentary rock (Conglomerate)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (variant Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (variations include Chalcedony and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions