Sedimentary

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Limonite (Iron Ore)

Limonite (̑FeO(OH)·nH₂O)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Septarian Nodule (Dragon Stone)

Septarian Nodule (containing Calcite, Aragonite, and Limestone/Clay)

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Jasper (Yellow/Brown variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Oolite (Ooid Limestone)

Ooidal Limestone (comprised of CaCO3)

River Rocks (Black)

Various lithologies (e.g., basalt, chert, obsidian for black varieties), mechanically rounded clasts

Banded Agate (specifically Lake Superior Agate or similar)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Banded Iron Formation (BIF)

Banded Iron Formation

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)

Yellow Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert Nodules (with Gryphaea or Shell inclusions)

Microcrystalline Quartz (SiO2) with Calcitic inclusions

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Chert (Nodule)

Microcrystalline Silica (SiO2)

Chert (with possible fossils)

Microcrystalline quartz (SiO2)

Chert / Flint

Silicon Dioxide (SiO2)

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (Microcrystalline Quartz)

SiO2 (Silicon Dioxide) with Iron Oxide inclusions

Chert (often called Flint in this variation)

Silicon dioxide (SiO2) - Microcrystalline quartz

Jasper (Red/Brown)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Green Moss Agate

Silicon Dioxide with inclusions (SiO2)

Chert (Red Jasper variant)

Microcrystalline Quartz (SiO2)

Red Sandstone

Arenite with Hematite (Fe2O3) cement

Jasper Beach Pebble

Silicon Dioxide (SiO2) - Macro-crystalline Quartz

Coquina

Bioclastic Limestone (composed of CaCO3)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Chert (often called Flint or River Stone)

Microcrystalline Quartz (SiO2)

Coquina

Coquina (Bioclastic Limestone)

Chert (Flint variety)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Coquina

Biogenic Limestone

Banded Iron Formation (Jaspilite)

Banded Iron Formation (BIF); predominantly Hematite (Fe2O3) and Magnetite (Fe3O4) with Chert/Jasper (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)

Phylum Echinodermata, Class Echinoidea