Organic (Paper And Cellulose)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Jasper with Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (White Chert/Flint)

Chert (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (Blue-Gray Chert)

Microcrystalline quartz (SiO2)

Chert (Pink variety/Jasper)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (varietal: Flint/Jasper mix)

Hydrous Silica (SiO2)

Chert (Black Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Chert (with Iron Staining)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified wood (Quartz, SiO2)

Chert (Chert Nodule with Cortex)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Chert (often called Jasper in this color variety)

Microcrystalline Quartz (SiO2)

Chert (Chalcedony)

Silicon Dioxide (SiO2)

Chert (often called Flint or Jasper based on color)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert / Flint

Silicon Dioxide (SiO2)

Chert Pebble (Jasper/Quartz variety)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (varietal Chalcedony or Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (Quartz)

Microcrystalline Silica (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Herkimer Diamond

Quartz (Silica - SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

Chert (variations include Flint/Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ironstone Concretion (Iron-rich Mudstone)

Siderite / Geothite concretion (FeCO3 / FeO(OH))

Travertine

Calcareous Tufa (CaCO3)

Chert (and Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper)

Silicon Dioxide (SiO2)

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Chert (Nodule)

Silicon Dioxide (SiO2)