Anthropogenic Sedimentary Style Organic Solid

Chert (often called Flint or River Stone)

Chert (SiO2)

Chert Nodule

Microcrystalline Silica (SiO2)

Chert (Chalky/Gray Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossilized Shark Tooth (Fragment)

Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)

Moss Agate

Agate (Silicon Dioxide, SiO2) with dendritic inclusions

Chert (with Limestone and Iron Oxide staining)

Cryptocrystalline Quartz (SiO2)

Fossiliferous Shale

Laminated Mudrock with plant fossils

Chert (White/Light Tan)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Chert (River Cobble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (specifically Gray/Tan Chert Node)

Microcrystalline Quartz (SiO2)

Orthoceras Fossil Limestone

Orthoceras (extinct Cephalopod fossil) in Matrix

Petrified Wood

Silicified Wood (SiO2)

Coquina / Shelly Limestone

Coquina (Biogenic Limestone)

Chert (specifically Flint or Common Chert)

Microcrystalline Quartz (SiO2)

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Limestone-based)

Silicon dioxide (SiO2)

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Chert (Nodular or Fossiliferous)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Flint nodule)

Chert (SiO2)

Chert (with Quartz vein/coating)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Fossilized Horn Coral

Order Rugosa (Rugose Coral)

Chert (Chert / Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Quartz Variety)

Chert (Silicon Dioxide, SiO2)

Fossilized Coral

Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (and Flint)

Microcrystalline Silica (SiO2)

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

Chert (variously known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and/or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Banded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Cryptocrystalline Quartz (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)