Sedimentary

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Jasper (Chocolate or Brown Jasper)

Silicon Dioxide (SiO2)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

Fossilized Turritella Gastropod (Internal Mold)

Turritella (Fossil Gastropod Crust)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dragon Blood Jasper

Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper

Silicon dioxide (microcrystalline quartz with iron oxide inclusions), SiO2

Jasper

Silicon Dioxide (SiO2)

Travertine

Travertine (CaCO3 - Calcium Carbonate)

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Zebra Jasper

Jasper (variety of Quartz/Chalcedony), SiO2

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained or Jasperoid)

Microcrystalline Quartz (SiO2)

Jasper

Cryptocrystalline Quartz (SiO2)

Chert / Chalcedony (likely carnelian or flint variety)

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Red Jasper (nodule)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Yellow Jasper / Chert

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (White Chert)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Chert (with Iron Staining)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Puddingstone

Conglomerate

Chert (specifically Flint or Jasper variant)

Cryptocrystalline Quartz (SiO2)

Agate (specifically Chalcedony/Banded Agate)

Silicon Dioxide (SiO2)

Druzy Quartz on Sandstone

Silicon Dioxide (SiO2) with Quartz crystals

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper (possibly Carnelian)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Jasper (likely a variety of Brecciated Jasper or a patterned variety)

Silicon dioxide (SiO2)

Chert (Yellow/Tan)

Microcrystalline Quartz (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Septarian Nodule (Dragon Stone)

Septarian Concretion (CaCO3 + CaMg(CO3)2 + SiO2)