Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Chert (Flint/Chalcedony)

Microcrystalline Quartz (SiO2)

Chert Pebble Map

Microcrystalline Quartz (SiO2)

Chert (Holey Stone)

Microcrystalline Quartz (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Chert (with Limestone matrix)

Microcrystalline Quartz (SiO2)

Chert (or Flint)

Mocrocrystalline Quartz (SiO2)

Chert (with Liesegang Banding)

Microcrystalline quartz (SiO2)

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Flint Nodules)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Chert (specifically Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Black Chert

Chert (microcrystalline quartz)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Iron-stained Quartz (Gossan/Limonite-coated Quartz)

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

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Blue Chalcedony

Silicon Dioxide (SiO2)

Chert Nodule (Fossiliferous Chert)

Microcrystalline Quartz (SiO2)

Banded Chert (River Cobble)

Microcrystalline Quartz (SiO2)

Banded Chert (Ironstone/Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxides

Jasper (specifically variegated or swamp jasper beads)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (White Chert/Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Yellow Jasper

Cryptocrystalline quartz (SiO2) with iron inclusions

Chert (often called Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Lake Superior Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Yellow Jasper

Cryptocrystalline Quartz (SiO2) with iron inclusions

Bloodstone Jasper (Heliotrope)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Amber Flint (Chert)

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Biggs Jasper

Cryptocrystalline Quartz (Silicon Dioxide) - SiO2

Chert (specifically Green Chert/Jasper)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Nodule)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Agate

Chalcedony (cryptocrystalline variety of Quartz, SiO2)

Chert

Microcrystalline Quartz (SiO2)

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Tan/Buff Chert)

Microcrystalline Quartz (SiO2)

Chert

Microcrystalline Quartz (SiO2)