Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)

Chert Pebble (Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (Nodule / Geode fragment)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Dalmatian Jasper

Peralkaline rhyolite

Chert (varietal: Flint Pitted Pebble)

Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Flint)

SiO2 (predominantly microcrystalline or cryptocrystalline quartz)

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Chert (Iron-rich or Jasperoid)

Cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Bumblebee Jasper

Fossiliferous Calcite containing Orpiment and Realgar

Banded Iron Formation

Banded Iron Formation (BIF)

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)

Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)

Dalmatian Stone

Dalmatian Jasper (Aplitic Perthite)

Chert (Arrowhead or Projectile Point)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Chert (with Quartz Vein)

Microcrystalline Silica (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Common Opal/Agate mixture)

Microcrystalline Quartz (SiO2)

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Cryptocrystalline quartz (SiO2)

Chert

Silicon dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Chalk-associated Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Gray/Tan Bedded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert with Quartz/Calcite Vein

Microcrystalline Silica (SiO2)

Dalmation Stone (frequently called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Chert (and Limestone) River Cobble

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Chert with Quartz Veining

Silicon Dioxide (SiO2)

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

Chert (Tan/Yellow variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Banded Chert or Chert with Quartz Veins

Chert (SiO2)

Chert Nodule (Commonly known as a Flint or River Cobble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)